Page 1 Features The Toshiba 610CT is one of the lightest and most advanced portable computers available. Utilizing advanced technology and high-speed components, the 610CT offers excellent display legibility, battery operation, and IBM PC/AT compatibility. The 610CT system unit has the following features: Microprocessor A Pentium®...
Page 2 Personal Computer Memory Card International Association (PCMCIA) card slot Two PCMCIA slots enable you to install an MiNC Toshiba card modem or other industry-standard PCMCIA release 2.01 card. Parallel port One Centronics compatible parallel interface port. RS-232-C port One 9-pin serial interface port.
Page 3 The 610CT Personal Computer is shown in figure 1-1. Figure 1-1 610CT The 610CT system configuration is shown in figure 1-2. Figure 1-2 610CT system unit configuration 610CT...
Page 4 System Unit Block Diagram Figure 1-3 is a block diagram of the 610CT system unit. Figure 1-3 610CT system board block diagram 610CT...
Page 5 The 610CT system board has the following major components: One Intel Pentium-90 MHz with VRT 64-bit microprocessor Intel Pentium processor operates at 90 MHz and 2.9 volts Standard RAM 8 MB, four 1Mx16-bit chips 3.3 volt operation No parity bit...
Page 6 I/O Controller Gate Array (IOCNT-GA) This gate array has the following functions: Internal Communication controller KBC, main CPU communication register file KBC interrupt controller Others KBC communication controller Contrast adjust, speaker volume adjust, PWM control Sound board interface BIOS-ROM interface SIM control 610CT...
Page 7 The KBC controls the internal keyboard, external keyboard, PS/2 mouse. Real Time Clock (RTC) One T9934 chip is used. The T9934 has 128 of bytes memory. Fourteen bytes of memory are used for the calendar and clock. The remaining 114 bytes are used for the system configuration data. 610CT...
Page 8 3.5-inch External Floppy Disk Drive The 610CT 3.5-inch external Floppy Disk Drive (FDD) is a thin, high-performance reliable drive that supports 720-KB (formatted) 2DD and 1.44-MB (formatted) 2HD 3.5-inch floppy disks. The 610CT FDD is shown in figure 1-4. Figure 1-4 3.5-inch external FDD The specifications for the FDD are listed in table 1-1.
Page 9 Specifications for the HDD are listed in table 1-2. Table 1-2 2.5-inch HDD specifications Items (MK1724FCV) Storage capacity (MB) Formatted 722 MB Number of disks Data heads Data surfaces Bytes per sector Rotation speed (rpm) 4000 Recording method 1-7 RLL 610CT...
Page 10 Keyboard The 82-(USA) or 84-(European) keyboard is mounted on the 610CT system unit. The key- board is connected to the keyboard controller on the system board through a 25-pin flat cable. The pointer control stick, located in the center of the keyboard, provides convenient control of the cursor without requiring desk space for a mouse.
Page 11 1.6.1 LCD Module The 610CT TFT color LCD supports 640x480 pixels with an internal display controller and 256K colors for graphics and characters. This controller includes the functions of Video Graphics Array (VGA) and Super VGA (SVGA) for external display.
Page 12 The FL inverter board supplies high frequency current to light the LCD’s Fluorescent Lamp. The specifications for the FL inverter are described in table 1-4. Table 1-4 FL inverter board specifications Item Specifications Input Voltage (VDC) Power Output Voltage (VAC) 1,100 (r.m.s.) Current (mA) Frequency (KHz) 1-12 610CT...
Page 13 Power Supply The power supply provides five kinds of voltages to the 610CT system board. The power supply has one microprocessor which operates at 500 KHz and performs the following func- tions: Determines if the AC adapter or battery is connected to the computer.
Page 14 The backup and main battery maintain the state of the computer when you enable AutoResume. Battery Indicator The Battery indicator is located on the front side of the 610CT. The indicator shows the status of the removable battery pack, power supply, and AC adapter. The status of each can be determined by color: Orange The battery is being charged.
Page 15 The battery or AC adapter output voltage is abnormal. The charge current is abnormal. Trickle Battery Charge When the main battery is fully charged and the AC adapter is attached, the power supply microprocessor automatically changes quick charge to trickle charge. 1-15 610CT...
Page 16 Table 1-9 shows the charging time and data preser- vation period of the RTC battery. Table 1-9 RTC battery charging/data preservation time RTC Battery Time Charging Time Power On 70 H Power Off Doesn’t charge Data preservation period (full charge) 1 month 1-16 610CT...
Page 17 Troubleshooting Chapter 2 describes how to determine if a Field Replaceable Unit (FRU) in the 610CT is causing the computer to malfunction. The FRUs covered are: Power Supply System Board Floppy Disk Drive Hard Disk Drive Keyboard Display The Diagnostics Disk operations are described in Chapter 3 and detailed replacement proce- dures are given in Chapter 4.
Page 18 (F31PRT), then turn the POWER switch on. The computer will override the password function by erasing the current password. Verify with the customer that Toshiba MS-DOS is installed on the hard disk. Non- Toshiba operating systems can cause the computer to malfunction.
Page 19 Figure 2-1 Troubleshooting flowchart (1/2) 610CT...
Page 20 If an error is detected on the floppy disk test, perform the floppy disk drive troubleshooting procedures in section 2.5. If an error is detected on the hard disk test, perform the hard disk drive troubleshooting procedures in section 2.6. 610CT...
Page 21 Procedure 1 DC IN Icon Indicator Check The 610CT AC adapter converts AC power to DC power and contains a charging circuit which charges the batteries. The adapter connects to the DC IN socket connector on the back side of the computer. When the AC adapter is connected to the computer and the power is turned off, the AC adapter charges the batteries.
Page 22 The Battery LED indicator shows the battery charging status. The Battery LED, identified by a battery icon on the front of the computer, glows amber when the AC adapter is charging the 610CT battery pack. If the Battery LED indicator glows green, the AC adapter is connected and the battery is fully charged.
Page 23 Connection and Replacement Check The power supply board is connected to the system board. This connection may become damaged or disconnected from the system board. Disassemble the 610CT following the steps described in chapter 4, Replacement Procedures, and perform the following checks.
Page 24 If an error message is shown on the display, perform Check 1. If there is no error message, go to Procedure 2. If Toshiba MS-DOS is properly loaded, go to Procedure 3. Check 1 If one of the following error messages is displayed on the screen, press the F1 key as the message instructs.
Page 25 This error message appears when data stored in RAM under the resume function is lost because the battery has become discharged or the system board is damaged. Go to Procedure 3. If any other message appears, perform Check 3. 610CT...
Page 26 (15) DMAC #2 ERROR (16) PIC #1 ERROR (17) PIC #2 ERROR (18) HDC ERROR (19) HDD #0 ERROR (20) HDD #1 ERROR (21) NO FDD ERROR (22) FDD ERROR (23) TIMER INTERRUPT ERROR (24) RTC UPDATE ERROR 2-10 610CT...
Page 27 Figure 2-2 shows the printer port LED. Figure 2-2 Printer port LED To use the printer port LED follow these steps: Turn on the 610CT power, then set to boot mode. Turn off the computer’s power. Plug the printer port LED into the 610CT Printer connector.
Page 28 EXTENDED MEMORY ERROR ADDRESS = XXXXXXXXH READ DATA = XXXXXXXXH WRITE DATA = XXXXXXXXH EXTENDED MEMORY PARITY ERROR ADDRESS = XXXX0000H - XXXXFFFFH DMA page register test DMA PAGE REGISTER ERROR READ DATA = XXH WRITE DATA = XXH 2-12 610CT...
Page 29 If error code 4Ah is displayed, go to the Keyboard Troubleshooting procedures in Section 2.7. Check 3 If error code 5Ah is displayed, go to the HDD Troubleshooting Procedures in Section 2.6. Check 4 If error code 60h is displayed, go to the FDD Troubleshooting Procedures in Section 2.5. 2-13 610CT...
Page 30 The system has optional ROM, or an optional card (CGA, MDA) Backup RAM checksum error Main memory checksum error Video RAM checksum error Extended memory checksum error Backup RAM checksum error Main memory checksum error Video RAM checksum error Extended memory checksum error Card modem error Password error 2-14 610CT...
Page 31 If an error is detected during any of these tests, go to Procedure 5. Procedure 5 Replacement Check The system board may be damaged. Disassemble the 610CT following the steps described in chapter 4, Replacement Procedures, and perform the following check: Check Replace the system board with a new one.
Page 32 Floppy Disk Drive Troubleshooting This section describes how to determine if the 610CT 3.5-inch external floppy disk drive is functioning properly. If the 3.5-inch external FDD is not connected to the computer, connect it and perform the steps below starting with Procedure 1 and continuing with the other proce- dures as required.
Page 33 Procedure 2 Diagnostic Test Program Execution Check The Floppy Disk Drive Diagnostic Test program is stored on the 610CT Diagnostics Disk. After loading Toshiba MS-DOS, run the diagnostic program. Refer to Chapter 3, Tests and Diagnostics, for more information about the diagnostics test procedures.
Page 34 The FDD or its cable may be defective or damaged. Replace the FDD and cable with new ones. If the FDD is still not functioning properly, perform Check 3. Check 3 Replace the system board with a new one following the steps in chapter 4, Re- placement Procedures. 2-18 610CT...
Page 35 Manual for more information about how to perform the BACKUP command. Procedure 1 Partition Check Insert the Toshiba MS-DOS system disk and turn the computer on, then perform the follow- ing checks: Check 1 Type C: and press Enter. If you cannot change to drive C, go to Check 2. If you can change to drive C, go to Procedure 2.
Page 36 Procedure 2 Message Check When the 610CT HDD does not function properly, some of the following error messages may appear on the display. Start with Check 1 below and perform the other checks as instructed. Check 1 If any of the following messages appear, perform Check 2. If the following mes-...
Page 37 Procedure 3 Format Check The 610CT HDD is formatted using the low level format program and the MS-DOS FOR- MAT program. To format the HDD, start with Check 1 below and perform the other steps as required. Check 1 Using the Toshiba MS-DOS system disk, partition the hard disk using the FDISK command.
Page 38 Procedure 4 Diagnostic Test Program Execution Check The HDD test program is stored in the 610CT Diagnostics Disk. Perform all of the HDD tests in the Hard Disk Drive Test. Refer to chapter 3, Tests and Diagnostics, for more infor- mation about the HDD test program.
Page 39 Keyboard Troubleshooting To determine if the 610CT keyboard is functioning properly, perform the following proce- dures. Start with Procedure 1 and continue with the other procedures as instructed. Procedure 1: Diagnostic Test Program Execution Check Procedure 2: Connector and Replacement Check...
Page 40 Refer to chapter 4 for more information. If the keyboard is still not functioning properly, perform Check 6. Check 6 The sound board may be damaged. Replace the sound board with a new one. Refer to chapter 4 for more information. If the problem still exists, other FRUs may be damaged. 2-24 610CT...
Page 41 Procedure 2 Diagnostic Test Program Execution Check The Display Test program is stored on the 610CT Diagnostic Disk. This program checks the display controller on the system board. After loading Toshiba MS-DOS, run the Diagnostic Program. Refer to chapter 3, Tests and Diagnostics, for details.
Page 42 If some screen functions do not operate properly, perform Check 3. If the FL remains lit when the display is closed, perform Check 4. Check 1 Replace the FL unit with a new one and test the display again. If the problem still exists, perform Check 2. 2-26 610CT...
Page 43 Check 5 Replace the display cable with a new one and test the display again. If the problem still exists, perform Check 6. Check 6 The system board may be damaged. Replace the system board with a new one. 2-27 610CT...
Page 44 The Diagnostic Test This chapter explains how to use the 610CT Diagnostic Test Program (TEST610) to test the functions of the hardware modules. The Diagnostics Test Program is stored on the Diagnos- tic Disk. The Diagnostics Test Program consists of 20 programs that are grouped into the Service Program Module (DIAGNOSTICS MENU) and the Test Program Module (DIAG- NOSTIC TEST MENU).
Page 45 Executing the Diagnostic Test Toshiba MS-DOS is required to run the 610CT Diagnostic Test Program. To start the Diag- nostic Test Program follow these steps: Insert the 610CT Diagnostics disk in the computer’s external floppy disk drive and turn the computer on.
Page 46 03 - Version check 04 - Fan ON/OFF 05 - Thermistor check 99 - Exit to DIAGNOSTIC TEST MENU ↑↓→← Select items Enter Specify Exit NOTE: The menu displayed by your 610CT may be slightly different from the one shown above. 610CT...
Page 47 Use the arrow keys to move the cursor to the desired option and press Enter. Table 3-1 in section 3.3 describes the function of each test on the subtest menu. Table 3-3 in section 3.16 describes the error codes and error status for each error. 610CT...
Page 48 80*25/30 Character display 320*200 Graphics display 640*200 Graphics display 640*350/480 Graphics display Display page “H” pattern display/Border color LED/DAC pallet Color display Sequential read Sequential read/write Random address/data Write specified address Read specified address PRINTER Ripple pattern Function Wrap around 610CT...
Page 49 Cross talk & peak shift Write/read/compare (CE) Write specified address Read specified address ECC circuit Sequential write W-R-C specified address REAL TIMER Real time Backup memory Real time carry NDP test EXPANSION PCMCIA wrap around SOUND CODEC (REC/PLAY) FM synthesizer SINE wave playback 610CT...
Page 50 S key. When the read information is higher, the display is unchanged. ROM BIOS Version = V1.00 : OK V1.10 BOOT ROM Version = V1.00 : OK V1.00 KBC Version = V1.26 : NG V1.00 PS Micom Version = V1.35 : OK V1.35 Reference data Current data 610CT...
Page 51 *** Fan OFF *** : Press [Enter] key? When you press Enter, the fan should stop. Subtest 05 Thermistor check This subtest checks the thermistor that controls CPU temperature. The ther- mistor cable connects to PJ23 on the system board. 610CT...
Page 52 Subtest 04 Protected mode This subtest writes constant data and address data to extended memory (maxi- mum address 100000h) then reads new data and compares the result with the original data. The constant data is FFh, AAh, 55h, and 00h. 610CT...
Page 53 32 MB. After selecting subtest 05, the following message will appear: Extended memory size (1:8 MB,2:16 MB,3:24 MB,4:32 MB) ? Select the number that corresponds to the memory card installed in the 610CT. Subtest 06 Cache memory To test the cache memory, a pass-through write-read comparison of ‘5A’ data is run repeatedly to test area (‘7000’:’Program’...
Page 54 To execute the Keyboard Test, select 3 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions displayed on the screen. The Keyboard test contains four subtests that test the 610CT keyboard actions. Move the highlight bar to the subtest you want to execute and press Enter.
Page 55 If this test does not detect an error, it returns to the subtest menu. If this test detects an error, the following message appears: KBD - MOUSE INTERFACE ERROR [[ HALT OPERATION ]] 1: Test end 2: Continue 3: Retry 3-12 610CT...
Page 56 ***** IPS TEST PROGRAM (V1.00) ***** << PRESS BUTTON1 + BUTTON2 THEN END >> When the button is pressed, it alternates as shown below. 3-13 610CT...
Page 57 To execute the Display Test, select 4 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions displayed on the screen. The Display test contains eleven subtests that test the 610CT display in various modes. Move the highlight bar to the subtest you want to execute and press Enter.
Page 58 In this subtest, the character set (addressed 00h to FFh) is displayed in the 40*25 character mode as shown below. Press [Enter] KEY To exit this subtest and return to the DISPLAY TEST menu, press Ctrl + Break. 3-15 610CT...
Page 59 This subtest displays two color sets for the color display in 320x200 dot graphics mode 4 and D. One example is shown below: GREEN BROWN CYAN MAGENTA WHITE Pressing Enter toggles between tests. To exit this subtest and return to the DISPLAY TEST menu, press Ctrl + Break. 3-16 610CT...
Page 60 This subtest displays even dots, odd dots, and all dots in the 640x350, and 640x480 dot graphics mode 10, 12 as shown below: Pressing Enter changes the size of the displayed image. To exit this subtest and return to the DISPLAY TEST menu, press Ctrl + Break. 3-17 610CT...
Page 61 HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH Pressing Enter displays the following message: Setting the color CRT (1:yes/2:no) If an external CRT display is connected to the 610CT, choose 1 to display the following message: [Border color test (7 times press [Enter] key] Press Enter to execute the border color test.
Page 62 64 shades of red, green, and blue successively and the last three display 64 shades of red, green and blue. Also, it sets the video mode ‘5F’, and displays 256 colors. Press Enter to change the display. Press Ctrl + Break to exit. 3-19 610CT...
Page 63 Enter and follow the directions displayed on the screen. The Floppy Disk test contains five subtests that test the 610CT external floppy disk drive. The following messages will appear after selecting the Floppy Disk Test from the DIAGNOSTIC TEST MENU. Answer each question with an appropriate response to execute the test.
Page 64 3 above. The data is then read and compared to the original data. Subtest 04 Write Specified Address This subtest writes specified data to a specified track, head, and address. Subtest 05 Read Specified Address This subtest reads data from a specified track, head, and address. 3-21 610CT...
Page 65 The Printer Test contains three subtests that test the output of the printer connected to the 610CT. The following messages will appear after selecting the Printer Test from the DIAGNOSTIC TEST MENU. Answer each of the following questions with an appropriate response to execute the test.
Page 66 The printer wraparound con- nector (34M741986G01) wiring diagram is described in Appendix G. This subtest checks the output and bidirectional modes of the data control and status lines through the printer wraparound connector. 3-23 610CT...
Page 67 To execute the Async Test, select 7 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions displayed on the screen. The async test contains five subtests that test the 610CT asynchronous communication functions. Move the highlight bar to the subtest you want to execute and press Enter.
Page 68 This subtest is used with subtest 03 described above. This subtest receives the data from the send side, then sends the received data. Subtest 05 Interrupt Test This subtest checks the Interrupt Request Level of IRQ 4, 3, and 5 from the send side. 3-25 610CT...
Page 69 Enter, and follow the directions displayed on the screen. The hard disk test contains 10 subtests that test the 610CT hard disk drive functions. The following messages will appear after selecting the hard disk test from the DIAGNOSTIC TEST MENU. Answer each of the...
Page 70 • Forward sequential • Reverse sequential • Random Subtest 03 Random Address/Data This subtest writes random data to random addresses on the HDD cylinder, head and sector. This data is then read and compared to the original data. 3-27 610CT...
Page 71 This subtest writes specified 2-byte data to all of the cylinders on the HDD. Subtest 10 W-R-C specified address This subtest writes data to a specified cylinder and head on the HDD, then reads the data and compares it to the original data. 3-28 610CT...
Page 72 To execute the Real Timer Test, select 9 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions on the screen. The real timer test contains three subtests that test the 610CT real timer functions. Move the highlight bar to the subtest you want to execute and press Enter.
Page 73 Current date : 12-31-1994 Current time : 23:59:58 Pressing Enter displays the following: Current date : 01-01-1995 Current time : 00:00:00 PRESS [Enter] KEY TO EXIT TEST Press Ctrl + Break to exit. 3-30 610CT...
Page 74 3.13 NDP Test To execute the NDP test, select 10 from the DIAGNOSTICS TEST MENU, press Enter and follow the directions on the screen. The NDP test contains one subtest that tests the 610CT NDP functions. Subtest 01 This test checks the following NDP functions:...
Page 75 Good Contents 00001 Address line 00001 REG#, CE#1, CE#2 nn=A0, 90, 80, 00 00002 Data line ww=write data, rr=read data 00003 –– –– Speaker line 00004 40, 80 Wait line (40<xx<80) 00005 Other lines (BSY#, BVD1) nn=21, 00 3-32 610CT...
Page 76 3.15 Sound Test To execute the Sound test, select 12 from the DIAGNOSTICS TEST MENU, press Enter and follow the directions on the screen. The Sound test contains three subtests that test the 610CT series Sound functions. Subtest 01 CODEC (REC/PLAY) NOTE: To execute this subtest, the internal microphone and internal headphone (or internal speaker) are required.
Page 77 FDD Not Drive Error Time Out Error Write Buffer Error Printer Time Out Fault Select Line Out Of Paper Power Off Busy Line Async DSR On Time Out CTS On Time Out RX-READY Time Out TX-BUFFER Full Time Out 3-34 610CT...
Page 78 Control Word Error Status Word Error Bus Error Addition Error Multiply Error PCMCIA Address Line Error REG# Line Error CE#1 Line Error CE#2 Line Error DATA Line Error WAIT Line Error BSY# Line Error BVD1 Line Error No PCMCIA 3-35 610CT...
Page 79 “1” --- Drive is ready for data transfer. CORR “0” --- Other (Corrected data) “1” --- Correctable data error is corrected. “0” --- Other (Index) “1” --- Index is sensed. “0” --- Other (Error) “1” --- The previous command was terminated with some error. 3-36 610CT...
Page 80 “1” Illegal command error or a drive status error occurred. TK00 “0” The hard disk has found track 0 during a recalibrate command. (Track 0) “1” The hard disk could not find track 0 during a recalibrate command. —— Not used. 3-37 610CT...
Page 81 CAUTION: The contents of the hard disk will be erased when this program is executed. Before executing the function, transfer the contents of the hard disk onto a floppy disk(s). This can be done with the Toshiba MS-DOS BACKUP command. See the Toshiba MS-DOS manual for details.
Page 82 CAUTION: After the HDD has been formatted, execute the Toshiba MS-DOS FDISK command to partition the HDD. Next, execute the Toshiba MS-DOS FORMAT com- mand. Refer to the Toshiba MS-DOS manual for more information about using these commands. Selecting TEST 2 and pressing Enter in the DIAGNOSTIC MENU displays the following messages: DIAGNOSTICS - HARD DISK FORMAT : VX.XX...
Page 83 (f) below. Track verification A check is made of all tracks and if an ECC error, ECC-correctable-data error, or record-not-found error is detected at a track, that track is automati- cally formatted as a bad track. 3-40 610CT...
Page 84 Drive number select (1:#1, 2:#2) ? Bad tracks will be displayed in the format shown below. [[cylinder, head = 0123 03]] Press Enter to return to the Hard Disk Format menu. 3-41 610CT...
Page 85 Remove the Diagnostics Disk from the FDD, then insert the cleaning disk and press Enter. When the cleaning start message appears, the FDD head cleaning has begun. The display automatically returns to the DIAGNOSTIC MENU when the program is completed. 3-42 610CT...
Page 86 001 FDD 01 0000 180 00001 00 00 FDD - TIME OUT ERROR Address Error status Pass count HDC status Subtest number Read data Test name Write data Error count Error status name [[1:Next,2:Prev,3:Exit,4:Clear,5:Print,6:FD Log Read,7:FD Log Write]] 3-43 610CT...
Page 87 The 7 key writes the log information to a floppy disk. In the case of “error retry OK,” a capital “R” will be placed at the beginning of the error status. However, it is not added to the error count. 3-44 610CT...
Page 88 Printer wrap around test (Y/N) ? Selecting Y (yes) executes the printer wraparound test. A printer wraparound connector must be connected to the PRT port on the back of the 610CT to prop- erly execute this test. Select Y or N and press Enter. The following message will appear: Serial #A wrap around test (Y/N) ? Selecting Y (yes) executes the ASYNC wraparound test.
Page 89 Select Yes or No and press Enter. The following message will appear : Mount the work disk(s) on the drive(s), then press [Enter] key. [Warning : The contents of the disk(s), will be destroyed] This program is executed continuously. To terminate the program, press Ctrl + Break. 3-46 610CT...
Page 90 FORMAT NOTE: This program is only for testing a floppy disk drive. The option is different from the Toshiba MS-DOS FORMAT command. This program can format a 3.5-inch floppy disk in the following formats: 2D: Double-sided, double-density, 48/67.5 TPI, MFM mode, 512 bytes, 9 sectors/track.
Page 91 When COPY is selected, the following message appears: FLOPPY DISK FORMAT & COPY : VX.XX Type select (0:2DD-2DD,1:2D-2D,2:2D-2HD,3:2HD-2HD) ? Selecting a media/drive type number will display a message similar to the one below: Insert source disk into drive A: Press any key when ready. 3-48 610CT...
Page 92 Insert a source disk and press any key and the following message will appear: —— Max. address —— [Track ] = 0079 [ Head ] = 01 [Sector] = 09 Track number ?? Set the track number you want to dump. The system will access the disk and dump a list. 3-49 610CT...
Page 93 3.23 System Configuration 3.23.1 Function Description The System Configuration program contains the following configuration information for the 610CT: BIOS ROM version Boot ROM version KBC version PS Micom Version Base memory size The number of floppy disk drives The number of ASYNC ports...
Page 94 (b) Parallel Port (c) Sound System Password Others (a) Power-up Mode (b) CPU Cache (c) Battery Save Mode (d) Alarm Volume (e) System Beep (f) Panel Power On/Off (g) Alarm Power On (h) Keyboard (i) Pointing Devices (j) Boot Priority 3-51 610CT...
Page 95 If the changed item requires the system to reboot, the following message is dis- played: Are you sure? (Y/N) The changes you made will cause the system to reboot. The changes you made will cause the system to reboot. 3-52 610CT...
Page 96 This field displays the amount of extended memory the computer has avail- able. Shadow BIOS ROM The TSETUP program displays 192 KB of RAM, which is reserved for the Shadow BIOS ROM. This field displays the amount of the extended memory used for the shadow BIOS ROM. 3-53 610CT...
Page 97 NOTE: When starting the computer in Resume mode, the last configuration is remembered. If data does not appear on the display you are using after starting in Resume mode, press Fn+F5. Pressing Fn+F5 changes the display setting as follows: internal LCD → simultaneous → external CRT. 3-54 610CT...
Page 98 COM1 3F8h (Serial port default) COM2 2F8h COM3 3F8h (Serial port default) COM4 2F8h Not used (Disables port) NOTE: Do not assign the same interrupt request level and I/O address to the serial port and the PCMCIA card. 3-55 610CT...
Page 99 Use this option to set the I/O address from among the following settings: 0220h (Default), 0230h, 0240, 0250h Interrupt level This option sets the interrupt level for the sound system. The available settings are: IRQ5, IRQ7, IRQ9, IRQ10 (Default) 3-56 610CT...
Page 100 The password has been registered. Not registered The password has not been registered. For details on setting the password refer to the 610CT User’s Manual. Others Whether or not you need to configure the computer with these options depends primarily on the kind of software or peripherals you use.
Page 101 (Full Power or Low Power) is disabled and the user-preferred parameters become effective. The default setting in the sub-windows depends on the Battery Save Mode: Low Power (Long Life) or Full Power (Normal Life). For LCD Brightness for details, see Battery Save Options below. 3-58 610CT...
Page 102 Disables the feature. (Default) NOTE: Do not remove the AC adapter and battery pack at the same time when you use this feature. If you do so, data saved by AutoResume will be lost. You must also reset this option. 3-59 610CT...
Page 103 Use this option to set a key combination on an external keyboard to emulate the Fn key on the computer’s internal keyboard. Setting an Fn key equivalent will enable you to use “Hotkeys” by pressing the set combination in place of the Fn key. 3-60 610CT...
Page 104 The following set of options can be selected in the submenu of User Setting, which is one of the Battery Save Mode options. Processing Speed This feature changes the CPU processing speed. High CPU operates at 90 MHz. (Default) CPU operates at half speed. 3-61 610CT...
Page 105 Disables system automatic power off. xx Min. Automatically turns off power to the system if it is not used for the duration set. The duration xx can be set to 10, 20, 30, 40, 50, or 60 minutes. 3-62 610CT...
Page 106 When the CPU temperature falls to a normal range, the fan is turned off. Quiet Fan operation is disabled. If the CPU becomes too hot the processing speed is lowered. When the CPU temperature falls to a normal range, the processing speed is increased. 3-63 610CT...
Page 107 FRUs need to be removed in order to remove others. Always start by removing the battery pack, then follow the lines on the chart to determine which FRU you must remove next in order to repair the one you think is causing the 610CT to operate im- properly.
Page 108 To reduce the risk of accidental electric shock, remove any metal jewelry or accessories such as necklaces, bracelets or rings.. Never work with wet or damp hands. 3. The 610CT contains many sharp edges and corners, so be careful not to injure yourself. CAUTION: 1.
Page 109 Before You Begin Look over the procedures in this section before you begin disassembling the 610CT. Famil- iarize yourself with the disassembly and reassembly steps. Begin each procedure by removing the AC adapter and the battery pack as instructed in section 4.2, The Battery Pack.
Page 110 Make sure all the correct screws are used to secure all FRUs. Using the wrong screw can damage the screw and may prevent proper seating of an FRU. After installing an FRU in the 610CT, confirm that the FRU and the 610CT are functioning properly.
Page 111 0.22 N•m (2.2 kgf•cm) M2.5 0.36 N•m (3.5 kgf•cm) FDD 0.22 N•m (2.2 kgf•cm) HDD 0.3 N•m (3.1 kgf•cm) or less 610CT...
Page 112 To remove the 610CT battery pack, follow the steps below and refer to figures 4-1 and 4-2. Turn off the power to the 610CT. Disconnect the AC adapter, power cord, and all external cables connected to the computer. Close the display if it is open.
Page 113 Installing the Battery Pack To install the 610CT battery pack, follow the steps below and refer to figures 4-1 to 4-3. Place the right end of the battery pack at the red line marked on the alignment guide. The battery pack should seat level with the computer.
Page 114 Optional Memory Module Removing an Optional Memory Module To remove an optional memory module from the 610CT, follow the steps below and refer to figure 4-4. Turn off the power to the 610CT. Disconnect the AC adapter, power cord, and all external cables connected to the computer.
Page 115 Remove two screws securing the module to a brace at the center of the module and set them aside (figure 4-5). Lift up on the plastic tab to disengage the connectors, then grasp the module by the edges and remove it. Figure 4-5 Removing the memory module 610CT...
Page 116 Installing an Optional Memory Module To install an optional memory module in the 610CT, follow the steps below and refer to figures 4-4 through 4-6. Position the connector on the bottom of the module over the corresponding connector on the computer (align the holes on the side of the module over the screw holes on the brace).
Page 117 Optional PCMCIA Card Removing an Optional PCMCIA Card To remove an optional PCMCIA card from the 610CT, follow the steps below and refer to figure 4-7. Turn off the power to the 610CT. Disconnect the AC adapter, power cord, and all external cables connected to the computer.
Page 118 Installing an Optional PCMCIA Card To install an optional PCMCIA card in the 610CT, follow the steps below and refer to figure 4-8. Insert the PCMCIA card as shown in figure 4-8. When the card is almost fully seated, you will feel some resistance. Press gently to assure a firm connection, but do not force the card into position.
Page 119 Keyboard Removing the Keyboard To remove the 610CT keyboard, follow the steps below and refer to figures 4-9 through 4-12. Turn off the power to the 610CT. Disconnect the AC adapter, power cord, and all external cables connected to the computer.
Page 120 Do not remove the keyboard cable. Figure 4-11 Lifting the keyboard Disconnect the AccuPoint cable from PJ2 and the keyboard cable from PJ7 (figure 4-12). Figure 4-12 Removing the keyboard cable Lift out the keyboard. 4-14 610CT...
Page 121 Installing the Keyboard To install the 610CT keyboard, follow the steps below and refer to figures 4-9 through 4-12. Connect the AccuPoint cable to PJ2 and keyboard cable to PJ7 (figure 4-12). Replace the keyboard. Fit tongues on the back of the keyboard into corresponding holes on the top cover and lay the keyboard in place.
Page 122 Hard Disk Drive Removing the Hard Disk Drive To remove the 610CT hard disk drive, follow the steps below and refer to figures 4-13 and 4- Turn off the power to the 610CT. Disconnect the AC adapter, power cord, and all external cables connected to the computer.
Page 123 Remove four M3x4 flat-head screws securing the bracket to the HDD and remove the bracket. Figure 4-14 Removing the HDD bracket 4-17 610CT...
Page 124 Installing the Hard Disk Drive To install the 610CT hard disk drive, follow the steps below and refer to figures 4-13 and 4- Seat the HDD in its bracket. Secure the HDD to the bracket with four M3x4 flat-head screws.
Page 125 Top Cover Removing the Top Cover To remove the 610CT top cover, follow the steps below and refer to figures 4-15 through 4- Turn off the power to the 610CT. Disconnect the AC adapter, power cord, and all external cables connected to the computer.
Page 126 PJ17, and microphone from PJ2. Unthread the microphone cable. Figure 4-16 The top cover’s nine latches Unlatch nine latches securing the top cover to the base cover (figure 4-17). Figure 4-17 Separating the top cover Remove the top cover and display assembly. 4-20 610CT...
Page 127 Installing the Top Cover To install the 610CT top cover, follow the steps below and refer to figures 4-15 to 4-17. Set the top cover in place and snap in the nine latches (figures 4-16 and 4-17). Rethread the microphone cable.
Page 128 RTC and Backup Batteries Removing the RTC and Backup Batteries To remove the 610CT RTC and backup batteries, follow the steps below and refer to figure 4-18. Turn off the power to the 610CT. Disconnect the AC adapter, power cord and all external cables connected to the computer.
Page 129 Toshiba to be compatible with the unit. Since other batteries have different specifications, they may be incompatible with the unit and may burst or explode. To install the 610CT RTC and backup batteries, follow the steps below and refer to figure 4-18.
Page 130 AccuPoint Control Button Contact Removing the AccuPoint Control Button Contact To remove the 610CT AccuPoint control button contact, follow the steps below and refer to figure 4-19. Turn off the power to the 610CT. Disconnect the AC adapter, power cord, and all external cables connected to the computer.
Page 131 Installing the AccuPoint Control Button Contact To install the 610CT AccuPoint control button contact, follow the steps below and refer to figure 4-19. Lay the AccuPoint control button contact in place. Connect the cable to PJ3 on the sound board.
Page 132 4.10 Sound Board Removing the Sound Board To remove the 610CT sound board, follow the steps below and refer to figure 4-20. Turn off the power to the 610CT. Disconnect the AC adapter, power cord, and all external cables connected to the computer.
Page 133 Installing the Sound Board To install the 610CT sound board, follow the steps below and refer to figure 4-20. Partially position the sound board so the microphone and headphone ports on the sound board can be placed into the side cover.
Page 134 4.11 Power Supply Board Removing the Power Supply Board To remove the 610CT power supply board, follow the steps below and refer to figure 4-21. Turn off the power to the 610CT. Disconnect the AC adapter, power cord, and all external cables connected to the computer.
Page 135 Installing the Power Supply Board To install the 610CT power supply board, follow the steps below and refer to figure 4-21. Seat the power supply board in the bottom cover. Connect the power supply cable to PJ14 on the system board.
Page 136 4.12 System Board Removing the System Board To remove the 610CT system board, follow the steps below and refer to figure 4-22. Turn off the power to the 610CT. Disconnect the AC adapter, power cord, and all external cables connected to the computer.
Page 137 Installing the System Board To install the 610CT system board, follow the steps below and refer to figure 4-22. NOTE: New system boards do not have fans attached. Therefore, when you remove a malfunctioning system board for replacement, be sure to retain the fan for use in the new system board.
Page 138 Removing the Fan To remove the 610CT fan, follow the steps below and refer to figure 4-23. Turn off the power to the 610CT. Disconnect the AC adapter, power cord, and all external cables connected to the computer. Remove the battery pack, optional memory card, optional PCMCIA card, key-...
Page 139 Installing the Fan To install the 610CT fan, follow the steps below and refer to figure 4-23. Secure the fan to the system board with two M3x3 screws. Connect the fan cable to PJ16. Replace the system board, power supply board, AccuPoint control button contact, RTC and backup batteries, top cover, HDD, keyboard, optional PCMCIA card, optional memory card, and battery pack as described in sections 4.12 back through...
Page 140 4.14 LED Board and Speaker Removing the LED Board and Speaker To remove the 610CT LED board and speaker, follow the steps below and refer to figure 4-24. Turn off the power to the 610CT. Disconnect the AC adapter, power cord, and all external cables connected to the computer.
Page 141 Installing the LED Board and speaker To install the 610CT LED board and speaker, follow the steps below and refer to figure 4-24. Put the protective rubber cover on the speaker. Place the speaker in the assembly and secure the two latches.
Page 142 4.15 Display Mask Removing the Display Mask To remove the 610CT display mask, follow the steps below and refer to figure 4-25. Turn off the power to the 610CT. Disconnect the AC adapter, power cord, and all external cables connected to the computer.
Page 143 Installing the Display Mask To install the 610CT display mask, follow the steps below and refer to figure 4-25. Set the display mask in place and press firmly to secure the latches. Start at the bottom five latches and work your way around the sides (four latches on each side) and, finally, secure the six latches at the top.
Page 144 FL inverter during disassembly, never touch the exposed areas that carry high-voltage. To remove the 610CT FL inverter board, follow the steps below and refer to figure 4-26. Turn off the power to the 610CT. Disconnect the AC adapter, power cord, and all external cables connected to the computer.
Page 145 Installing the FL Inverter Board To install the 610CT FL inverter board, follow the steps below and refer to figure 4-26. Connect the FL inverter cable to CN1 and the FL cable to CN2 on the FL inverter board. Secure two silver M2x6 screws to hold the FL inverter board.
Page 146 4.17 TFT Color Display Module Removing the TFT Color Display Module To remove the 610CT TFT color display module, follow the steps below and refer to figure 4-27. CAUTION: When you remove the FL unit, be careful not to let any dust or other foreign matter contaminate the LCD panel.
Page 147 Installing the TFT Color Display Module To install the 610CT TFT color display module, follow the steps below and refer to figure 4-27. Connect the flexible cable to CN11. Seat the display module in the display cover and secure four silver M2x6 screws, one at each corner of the panel.
Page 148 4.18 Fluorescent Lamp Unit Removing the Fluorescent Lamp Unit To remove the 610CT fluorescent lamp (FL), follow the steps below and refer to figures 4-28 and 4-29. Turn off the power to the 610CT. Disconnect the AC adapter, power cord, and all external cables connected to the computer.
Page 149 Installing the Fluorescent Lamp Unit To install the 610CT fluorescent lamp unit, follow the steps below and refer to figures 4-28 and 4-29. Seat the FL unit, secure the cable in the latches, and replace the tape . Lay the FL unit cover in place and secure it with one M2.5x4 silver screw and one M2.5x2 silver screw.
Page 150 Removing the Microphone To remove the 610CT microphone, follow the steps below and refer to figure 4-30. Turn off the power to the 610CT. Disconnect the AC adapter, power cord, and all external cables connected to the computer. Remove the battery pack, optional memory module, PCMCIA card, keyboard, HDD, top cover, and display mask, as described in sections 4.2 through 4.7, and...
Page 151 4.20 Display Cable Removing the Display Cable To remove the 610CT display cable, follow the steps below and refer to figure 4-31. Turn off the power to the 610CT. Disconnect the AC adapter, power cord, and all external cables connected to the computer.
Page 152 LCD cover before securing the module with screws. Do not force the module into place, because stress can affect its performance. Also, the panel’s polarized surface is easily scarred, so be careful when handing it. 610CT...
Page 153 Be sure to quickly wipe off any liquid. Glass is used in the panel, so be careful not to drop it or let it strike a hard object, which could cause breakage or cracks. 610CT...
Page 154 Do not expose the module to direct sunlight or strong ultraviolet rays for long periods. Do not store the module at temperatures below specifications. Cold can cause the liquid crystals to freeze, lose their elasticity or otherwise suffer damage. 610CT...
Page 155 Do not disassemble the LCD module. Disassembly can cause malfunctions. If you transport the module, do not use packing material that contains epoxy resin (amine) or silicon glue (alcohol or oxime). These materials can release gas that can damage the panel's polarization. 610CT...
Page 156 Appendix B Board Layout System Board Front View Figure B-1 Board layout (front) 610CT...
Page 157 System Board Back View Figure B-2 Board layout (back) 610CT...
Page 158 Table B-2 System board ICs and connectors (back) Mark Number Name SISCNT GA IC8 to IC11 System Memory IC12 SYSTEM Clock IC13 IC15 BIOS ROM IC24 Video RAM IC25 PCMCIA GA IC26, IC27 Video RAM IC31 IC34 SIMM Connector 610CT...
Page 159 — HD17;100 HD21;100 HD18;100 HD22;100 HD19;100 HD23;100 — — HD24;100 HD28;100 HD25;100 HD29;100 HD26;100 HD30;100 — — HD27;100 HD31;100 HD00;100 HD04;100 HD01;100 HD05;100 — HGND — HD02;100 HD06;100 HD03;100 HD07;100 HD08;100 HD12;100 — — HD09;100 HD13;100 HD10;100 HD14;100 HD11;100 610CT...
Page 160 — N.C. — N.C. — N.C. — N.C. — N.C. — — — N.C. — N.C. — — — N.C. — N.C. — — — MA00;101 MA01;101 MA02;101 MA03;101 MA04;101 MA05;101 — MA06;101 MA07;101 MA09;101 MA08;101 MA11;101 MA10;101 — 610CT...
Page 161 Table C-3 FDD connector pin assignments (26-pin) Pin No. Signal name Pin No. Signal Name — IFINDX;000 — IFDASL;000 — DSKCHG;000 — IFRADY;000 IFHMED;000 IFAMON;000 IFLOWD;000 IFDIRC;000 SLFDLD;100 IFSTEP;000 — IFWDAT;000 — IFWEN;000 — IFTRKO;000 — IFWPRO;000 — IFRDAT;000 — IFSSEL;000 610CT...
Page 162 HDDCS0;000 HDDCS1;000 HDDLED;000 — — — — Pull Up (47K) — PJ5 Asynchronous Connector (9-pin) Table C-5 Asynchronous connector pin assignments (9-pin) Pin No. Signal name Pin No. Signal Name DCD1;101 RXD1;001 TXD1;011 DTR1;111 — DSR1;101 RTS1;101 CTS1;101 RI1;101 610CT...
Page 163 IFRADY;000 IFINDX;000 SELCT;100 SLIN;000 — PD2;100 PD0;100 STROB;000 — CVSYNC;110 PD1;100 PD3;100 PD6;100 ACK;000 IFWDAT;000 IFSTEP;000 IFWPRQ;000 — — — — RTS1;110 DCIN DCIN DCIN — TXD1;010 RT1;100 MOUSDT;100 — PRCHEK;000 IFHMED;000 IFDIRC;000 IFSSEL;000 IFTRKO;000 BUSY;100 PD7;100 PD4;100 CHSYNC;110 610CT...
Page 164 KBOT03;001 KBOT04;001 KBOT05;001 KBOT06;001 KBOT07;001 KBOT08;001 KBOT09;001 KBOT10;001 PJ9 LED Connector (12-pin) Table C-8 LED connector pin assignments (12-pin) Pin No. Signal name Pin No. Signal Name — — — — DCRED;101 DCGRN;101 CHGSP;120 CHHRQ;100 HDDLED CAPLED;101 ARWLED;101 NUMLED;101 610CT...
Page 165 — CADA03;100 CADB03;100 WAITA;000 WAITB;000 CADA04;100 CADB04;100 CRESTA;100 CRESTB;100 CADA05;100 CADB05;100 N.C. — N.C. — CADA06;100 CADB06;100 CADA25;100 CADB25;100 CADA07;100 CADB07;100 CADA24;100 CADB24;100 CADA12;100 CADB12;100 CADA23;100 CADB23;100 CADA15;100 CADB15;100 CADA22;100 CADB22;100 CADA16;100 CADB16;100 MCVPPA MCVPPB MCVPPA MCVPPB MCVCCA MCVCCB 610CT...
Page 166 — N.C. — OEA;000 OEB;000 CE2A;000 CE2B;000 CADA10;100 CADB10;100 CDA15;100 CDB15;100 CE1A;000 CE1B;000 CDA14;100 CDB14;100 CDA07;100 CDB07;100 CDA13;100 CDB13;100 CDA06;100 CDB06;100 CDA12;100 CDB12;100 CDA05;100 CDB05;100 CDA11;100 CDB11;100 CDA04;100 CDB04;100 CDA1;000 CDB1;000 CDA03;100 CDB03;100 — — — — — — 610CT...
Page 167 — PNLD12;140 — PNLD15;140 — PNLD13;140 — PNLD18;140 — PNLD19;140 — PNLD20;140 — PNLD21;140 C.11 PJ13 LCD Connector (5-pin) Table C-11 LCD connector pin assignments (5-pin) Pin No. Signal name Pin No. Signal Name DSPV DSPV — — BRIGHT;100 610CT...
Page 168 DCIN DCIN DCIN — — — — — — — PCLR;000 ACPUTH PSBUSY;000 DCGRN;100 RCLR;100 DCRED;100 PSSMI;000 — — — — — — — LOBAT;000 PSRD;100 ENVCC;000 SUSSTA;100 PSBEEP;000 PNLOF;000 PSSD;100 P12V CPUV CPUV CPUV CPUV CPUV CPUV C-10 610CT...
Page 169 Table C-15 Panel sensor connector pin assignments (3-pin) Pin No. Signal name Pin No. Signal Name PNLOFF;000 N.C. — — C.16 PJ18 Speaker Connector (2-pin) Table C-16 Speaker connector pin assignments (2-pin) Pin No. Signal name Pin No. Signal Name SPKP;100 SPKM;100 C-11 610CT...
Page 170 DACK0;000 DACK1;000 RESET;100 BLAWR;000 — — C14R3M;101 IRQ9;100 IRQ5;100 IRQ7;100 IRQ10;100 DRQ0;100 DRQ1;100 — — SDMUTE;100 SPKVOL;100 SPKP;100 SPKM;100 — — CSPTON;000 HKBEEP;100 PSPNBP;100 — — — IPSSELL;000 IPSSELR;000 — — — — — — — — ATBEEP;100 C-12 610CT...
Page 171 Table C-18 Sub-battery connector pin assignments (2-pin) Pin No. Signal name Pin No. Signal Name SUBBAT — C.19 PJ22 DC Jack Connector (3-pin) Table C-19 DC jack connector pin assignments (3-pin) Pin No. Signal name Pin No. Signal Name DCIN — — C-13 610CT...
Page 172 Appendix D Keyboard Scan/Character Codes Table D-1 Scan codes (set 1 and set 2) (1/3) Code set 1 Code set 2 Keytop Make Break Make Break Note ‘ ~ 7 & BkSp 29 (42) Caps Lock 610CT...
Page 173 E0 F0 11 E0 F0 70 E0 F0 71 ← E0 F0 6B Home E0 F0 6C E0 F0 69 ↑ E0 F0 75 ↓ E0 F0 72 PgUp E0 F0 7D PgDn E0 F0 7A → E0 F0 74 610CT...
Page 174 Combination with Fn key makes different codes. Fn key does not generate a code by itself. This key corresponds to key No. 42 in 102-key model. Refer to table D-6, scan codes with Ctrl key. Refer to table D-7, scan codes with Alt key. 610CT...
Page 175 E0 F0 7D E0 F0 12 PgDn E0 2A E0 51 E0 D1 E0 AA E0 12 E0 7A E0 F0 7A E0 F0 12 E0 2A E0 4D E0 CD E0 AA E0 12 E0 74 E0 F0 74 E0 F0 12 → 610CT...
Page 176 E0 2A E0 37 E0 B7 E0 AA E0 12 E0 7C E0 F0 7C E0 F0 12 Ctrl* E0 37 E0 B7 E0 7C E0 F0 7C Shift* E0 37 E0 B7 E0 7C E0 F0 7C Alt* F0 B4 610CT...
Page 177 Table D-7 Scan codes with Alt key Code set 1 Code set 2 Shift Make Make Pause Common SD C5 F0 77 Ctrl* *: This key generates only make codes. 610CT...
Page 178 Appendix E Key Layout United States (US) Keyboard Figure E-1 US keyboard United Kingdom (UK) Keyboard Figure E-2 UK keyboard 610CT...
Page 179 German (GR) Keyboard Figure E-3 GR keyboard French (FR) Keyboard Figure E-4 FR keyboard 610CT...
Page 180 Spanish (SP) Keyboard Figure E-5 SP keyboard Italian (IT) Keyboard Figure E-6 IT keyboard 610CT...
Page 181 Scandinavian (SC) Keyboard Figure E-7 SC keyboard Swiss-German (SL) Keyboard Figure E-8 SL keyboard 610CT...
Page 182 Canadian (Specialized) Keyboard Figure E-9 Canadian keyboard 610CT...
Page 183 (4) DTR Figure F-2 RS-232-C wraparound connector RS-232-C Direct Cable (9-Pin to 9-Pin) (3) TD (4) DTR (7) RTS (5) GND (2) RD (1) CD (6) DSR (8) CTS (9) RI Figure F-3 RS-232-C direct cable (9-pin to 9-pin) 610CT...
Page 184 RS-232-C Direct Cable (9-Pin to 25-Pin) (1) CD (2) RD (3) TD (4) DTR (22) (5) GND (7) RTS (6) DSR (20) (8) CTS (9) RI Figure F-4 RS-232-C direct cable (9-pin to 25-pin) 610CT...
Page 185 Turn off the power to the 610CT. Remove the external cable and PCMCIA card. Connect the external 3.5-inch floppy disk drive to 610CT. Turn on the power while holding down the F12 key. (Keep holding down the key until the system speaker sounds a beep.) When the message is displayed, insert the BIOS rewrite disk into the FDD.

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