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Summary of Contents for DEC DECpc LPx
- Page 1 Service Maintenance Manual DECpc LPx/LPx+ K-MN-SD00000 19-JG00.A MCS LOGISTICS ENGINEERING Copyright Digital Equipment Corporation NIJMEGEN All rights reserved THE NETHERLANDS January 1996...
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Page 2: Mcs Logistics Engineering - Nijmegen
January 1996 The information in this document is subject to change without notice and should not be construed as a commitment by Digital Equipment Corporation. Digital Equipment Corporation assumes no responsibility for any errors that might appear in this document. The software, if any, described in this document is furnished under a license and may be used or copied only in accordance with the terms of such license. -
Page 3: Table Of Contents
Running the BIOS Setup Utility ........................18 UPGRADE.EXE (DECpc LPx 560/566) ......................18 Before Using UPGRADE.EXE (DECpc LPx 560/566) ................19 Creating a Recovery Diskette (DECpc LPx 560/566)..................19 Upgrading the Computer's BIOS (DECpc LPx 560/566) ................20 Helpful Hints ..............................21 BIOS S ..........................22 ETUP... - Page 4 Table of Contents Digital DECpc LPx/LPx+ Px 560/566 Expansion Slots ..........................38 Installing Expansion Boards ..........................39 ...........................40 OGIC OARD UMPERS LPx Main Logic Board Jumper Settings .......................41 LPx Main Logic Board Jumper Locations ....................42 LPx+ Main Logic Board Jumper Settings.....................43 LPx+ Main Logic Board Jumper Locations....................44 LPx 560/566 Main Logic Board Jumper Settings ..................45...
- Page 5 Digital DECpc LPx/LPx+ Table of Contents CHAPTER 4 TROUBLESHOOTING......................73 ..........................73 NITIAL ROUBLESHOOTING .................................74 ODES Beep Codes for Fatal Errors ...........................74 Beep Codes for Non-Fatal Errors........................75 POST ..........................75 ESSAGES .........................77 OMPUTER ROUBLESHOOTING ........................79 RIVE ROUBLESHOOTING ...........................80 ONITOR ROUBLESHOOTING QAPlus/FE Error Messages..........................81 CHAPTER 5 DEVICE MAPPING........................83...
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Page 6: Table Of Figures
Table of Contents Digital DECpc LPx/LPx+ Table of Figures Figure 3 - 1 Removing the Outside Cover......................34 Figure 3 - 2 LPX Computer Model Components....................35 Figure 3 - 3 LPx Expansion Slots ........................36 Figure 3 - 4 LPx+ Expansion Slots........................37 Figure 3 - 5 LPx 560/566 Expansion Slots .......................38... -
Page 7: Revision History
Digital DECpc LPx/LPx+ Revision History Revision History Revision Date Description of Change Januari 96 First release of the Service Maintenance Manual describing the DECpc LPx/LPx+ series computer. This manual also includes the DECpc LPx 560/566. MCS Logistics Engineering - Nijmegen... -
Page 8: Preface
Preface Preface The DECpc LPx/LPx+ Service Maintenance Manual is a troubleshooting guide that can be used for reference when servicing the DECpc LPx/LPx+ line of PC’s. Digital Equipment Corporation reserves the right to make changes to the DECpc LPx/LPx+ series without notice. -
Page 9: Chapter 1 Product Description
Product Description Product Introduction DECpc LPx and LPx+ computers are high-performance personal computers equipped with the latest microprocessor and VL-bus technology. They can be used as stand-alone computers, as clients, or as servers in an network environment. Developed using modular CPU technology and offering a host of high-performance options, the DECpc LPx/LPx+ offers the most advanced computer in its class. - Page 10 Six full-size, 16-bit ISA expansion slots, or five full-size, 16-bit ISA expansion slots and one VL local bus slot, or four full-size, 16-bit ISA expansion slots and two VESA local bus slots DECpc LPx 560/566 features: ♦ Pentium CPU operating at 60 or 66 MHz ♦...
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Page 11: Product Models Information
Digital DECpc LPx/LPx+ Product Description Product Models Information EC = English, French, German, Italian and Spanish. ED = Danish, Dutch, English, Finnish, French (France excluded), Norwegian and Swedish. DECpc LPx Models Information Product Model Memory Cache Options PC761-A9 None DECpc LPx 425sx PC761-WA 1.44MB 170MB... -
Page 12: Decpc Lpx+ Models Information
Product Description Digital DECpc LPx/LPx+ DECpc LPx+ Models Information Product Model Memory Cache Options FR-802WW-A9 - None DECpc LPx+ 433sx FR-802**-WA 1.44MB 170MB None FR-802**-WF 1.44MB 340MB None FR-802**-WC 1.44MB 540MB None FR-803WW-A9 - None DECpc LPx+ 433dx FR-803**-WA 1.44MB 170MB... -
Page 13: Chapter 2 System Utilities & Configuration
MS-DOS executable version of the BIOS Setup utility. ♦ EPP3SMC.EXE allows to configure the printer to operate in EPP (Enhanced Parallel Port) mode (DECpc LPx/LPx+). ♦ KP.EXE ¾ allows to set a keyboard and mouse password. -
Page 14: Using The System Utilities Diskette
♦ Set a keyboard and mouse password (KP.EXE). ♦ Upgrade or restore the computer's BIOS (UPGRADE.EXE) (DECpc LPx 560/566). NOTE If this is the first time using the System Utilities diskette, it is recommended to follow the procedures in the order given. -
Page 15: Kp.exe
Digital DECpc LPx/LPx+ Utilities & Configuration KP.EXE KP.EXE is an MS-DOS executable file that allows to set a password for the keyboard and mouse without turning off the computer. When setting this password, the keyboard and mouse can not process any input other than the current keyboard and mouse password. -
Page 16: Configuring The Computer
Follow the instructions on screen and any on-line help pop-up screens to configure the computer. UPGRADE.EXE (DECpc LPx 560/566) All computers have BIOS software in a read-only, non-volatile memory (ROM) chip. This BIOS initializes hardware and boots the operating system when the computer is turned on. The BIOS also provides access to other services such as keyboard and disk drives. -
Page 17: Before Using Upgrade.exe (Decpc Lpx 560/566)
BIOS upgrade, J35 must be set to enable. After the upgrade, make sure J35 is set back to disable as a security measure (if desired). Creating a Recovery Diskette (DECpc LPx 560/566) Insert the backup copy of the System Utilities diskette into drive A. -
Page 18: Upgrading The Computer's Bios (Decpc Lpx 560/566)
Utilities & Configuration Digital DECpc LPx/LPx+ Upgrading the Computer's BIOS (DECpc LPx 560/566) Insert the backup copy of the System Utilities diskette into drive A. Select the Upgrade Flash from Image File menu option. You are then prompted to select a BIOS image file to program into flash memory. -
Page 19: Helpful Hints
Digital DECpc LPx/LPx+ Utilities & Configuration Helpful Hints ♦ Several keyboard function keys and numeric keypad keys are assigned to help selecting menus and options, changing option values, and displaying help information. These keys are displayed at the bottom of each setup configuration screen. -
Page 20: Bios Setup Utility Options
System date English Sets the desired language. Language Français DECpc LPx 560/566: The language field in SETUP.EXE contains all Deutsch the languages listed as possible settings. The BIOS Setup utility has Italiano English only. Run the UPGRADE.EXE program from the System Español... - Page 21 Digital DECpc LPx/LPx+ Utilities & Configuration BIOS Setup Utility Options (continued) Menu Field Settings Comments Setup only Enables or disables a system power-on and/or BIOS setup password. Password (LPx+) System only System and setup Not Installed System power- Enables or disables a system power-on and/or BIOS setup password.
- Page 22 Utilities & Configuration Digital DECpc LPx/LPx+ BIOS Setup Utility Options (continued) Menu Field Settings Comments Enabled at: Enables or disables any desired onboard serial port at the specified Serial port 2 2F8h-2FFh address. (IRQ3) 3E8h-3EFh (IRQ4) 2E8h-2EFh (IRQ3) Disabled 3F8h-3FFh...
- Page 23 Digital DECpc LPx/LPx+ Utilities & Configuration BIOS Setup Utility Options (continued) Menu Field Settings Comments Standard PIO Allows for a standard, compatible data transfer method (one data HDD data transfer block per interrupt). method Auto optimum Allows the computer's BIOS to automatically set up the installed drive for optimum performance (multiple data blocks per interrupt).
- Page 24 Utilities & Configuration Digital DECpc LPx/LPx+ BIOS Setup Utility Options (continued) Menu Field Settings Comments Enabled Enables or disables the computer's external (secondary) cache. Secondary cache Disabled Note: Enabling the secondary cache significantly improves computer performance by reducing the average number of wait states seen by the microprocessor.
- Page 25 Digital DECpc LPx/LPx+ Utilities & Configuration BIOS Setup Utility Options (continued) Menu Field Settings Comments Enabled Allows to enable or disable a caching request for the computer's Cache BIOS Disabled BIOS. Note: This option allows the computer's BIOS to be cached in the primary cache and secondary cache (if installed).
- Page 26 Utilities & Configuration Digital DECpc LPx/LPx+ BIOS Setup Utility Options (continued) Menu Field Settings Comments Enabled Enables or disables the computer's D8000 shadow option. Shadow 32K (1) (2) Disabled at D8000 Note: This option allows the computer to shadow any device BIOS located in the D8000 address space.
- Page 27 Digital DECpc LPx/LPx+ Utilities & Configuration BIOS Setup Utility Options (continued) Menu Field Settings Comments Disabled Allows to disable the monitor suspend feature, or, after a set period of Monitor Suspend 1 min. keyboard, mouse, or keyboard controller inactivity, allows to place the 5 min.
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Page 28: Chapter 3 Service Procedures
Digital DECpc LPx/LPx+ Service Procedures Chapter 3 Service Procedures Safety Requirements WARNING Static electricity collects on non-conductors such as paper, cloth, or plastic. A static discharge can be damaging even though you often cannot see or feel it. The following safety precautions must be observed to insure product and personal safety and prevent damage to circuit boards and/or components: ♦... -
Page 29: Recommended Tools
Service Procedures Digital DECpc LPx/LPx+ Recommended Tools The following tools will be needed for servicing Digital PC systems. Note that test equipment must be in calibration. ♦ Multimeter (4 1/2 digit) ♦ A philips screwdriver ♦ An antistatic wrist strap Other Needed Materials Cleaning agent should be an all purpose cleaner that is used in-house. -
Page 30: Eco/Fco Information
Digital DECpc LPx/LPx+ Service Procedures ECO/FCO Information BIOS version information. Refer to the Digital DECpc Bulletin Board Support , for the latest information on BIOS upgrades Network locations: North America, South America, Australia and New Zealand: PCBUHD::DKB300:[WC30.BBSFILES] Europe, Africa, Middle and Far East: SUTRA::D6:[PUBLIC]. -
Page 31: Unlocking And Removing Cover
Service Procedures Digital DECpc LPx/LPx+ Unlocking and Removing Cover WARNING You might injure yourself or damage the computer when attempting to remove the cover before unplugging ac and monitor power cords. Before removing the outside cover, do the following: Turn off power to all external devices connected to computer. -
Page 32: Computer Components
Digital DECpc LPx/LPx+ Service Procedures Computer Components Legend Description Power supply Six ISA expansion slots Main logic board 3½-inch diskette drive Front access drive bays Internal drive bay Two VESA-compliant VL-bus (local bus) expansion slots Figure 3 - 2 LPX Computer Model Components... -
Page 33: Expansion Slots
The DECpc LPx/LPx+ computer contains six expansion board slots that support standard 16-bit ISA expansion boards and 32-bit VESA-compliant VL-bus (local bus) expansion boards. The DECpc LPx 560/566 computer contains seven expansion board slots. Four of the slots support industry-standard 16-bit ISA expansion boards. The remaining three expansion slots support 32-bit PCI local bus expansion boards. -
Page 34: Expansion Slots For Lpx+ Models
Digital DECpc LPx/LPx+ Service Procedures Expansion slots for LPx+ Models The table below gives specific information about the expansion slots for the LPx+ computer. Expansion Slot Slot Type Description Supports industry-standard 16-bit ISA. J29 - J32 ISA / VL-bus Supports industry-standard 16-bit ISA expansion boards or 32-bit J33 - J34 VL-bus expansion boards. -
Page 35: Expansion Slots For Lpx 560/566 Models
Service Procedures Digital DECpc LPx/LPx+ Expansion slots for LPx 560/566 Models The table below gives specific information about the expansion slots for the LPx 560/566 computer. Expansion Slot Slot Type Description Supports industry-standard 16-bit ISA expansion boards. J7, J8, J9 Supports industry-standard 16-bit ISA expansion boards. -
Page 36: Installing Expansion Boards
Digital DECpc LPx/LPx+ Service Procedures Installing Expansion Boards To install an ISA or VL-bus expansion board: Turn off the computer. Disconnect external devices, ac power, and monitor power. Unlock and remove outside cover. Unscrew and remove the metal filler plate for the desired expansion slot. -
Page 37: Main Logic Board Jumpers
Service Procedures Digital DECpc LPx/LPx+ Main Logic Board Jumpers Jumper pins allow to set specific computer parameters. They are set by changing the pin location of jumper blocks. Note that the square pin of each jumper block is pin 1. A jumper block is a small plastic-encased conductor (shorting plug) that slips over the pins. -
Page 38: Lpx Main Logic Board Jumper Settings
Digital DECpc LPx/LPx+ Service Procedures LPx Main Logic Board Jumper Settings Settings shown in bold italics are factory defaults. Feature Description Setting Factory test Normal J16, open MFG test J16, jumpered Video display type Mono monitor J15, open Color monitor... -
Page 39: Lpx Main Logic Board Jumper Locations
Service Procedures Digital DECpc LPx/LPx+ LPx Main Logic Board Jumper Locations Figure 3 - 7 LPx Main Logic Board Jumper Locations MCS Logistics Engineering - Nijmegen... -
Page 40: Lpx+ Main Logic Board Jumper Settings
Digital DECpc LPx/LPx+ Service Procedures LPx+ Main Logic Board Jumper Settings Settings shown in bold italics are factory defaults. Feature Description Setting Password clear (MFG testing) Normal J15, open Password clear (MFG test) J15, jumpered Video display type Mono monitor... -
Page 41: Lpx+ Main Logic Board Jumper Locations
Service Procedures Digital DECpc LPx/LPx+ LPx+ Main Logic Board Jumper Locations Figure 3 - 8 LPx+ Main Logic Board Jumper Locations MCS Logistics Engineering - Nijmegen... -
Page 42: Lpx 560/566 Main Logic Board Jumper Settings
Digital DECpc LPx/LPx+ Service Procedures LPx 560/566 Main Logic Board Jumper Settings NOTE The HD Active Display connector (J44) is used for external SCSI/IDE adapters to display hard drive activity. CAUTION Do not use the password clear jumper (J32); use instead the clear CMOS jumper (J29). -
Page 43: Lpx 560/566 Main Logic Board Jumper Locations
Service Procedures Digital DECpc LPx/LPx+ LPx 560/566 Main Logic Board Jumper Locations Figure 3 - 9 LPx 560/566 Main Logic Board Jumper Locations MCS Logistics Engineering - Nijmegen... -
Page 44: Lpx 560/566 Cpu Board Jumper Settings
Digital DECpc LPx/LPx+ Service Procedures LPx 560/566 CPU Board Jumper Settings Feature Description Setting 60 MHz J5, pins 2 and 3 jumpered CPU clock input (Default depends on the CPU 66 MHz J5, pins 1 and 2 jumpered installed at the factory.) -
Page 45: Computer Memory Configurations
Service Procedures Digital DECpc LPx/LPx+ Computer Memory Configurations Adding more memory allows the computer to run larger, more complicated software and to run it faster. LPx and LPx+ Memory Configurations The computer comes with at least 4 MB of memory. This amount can be increased up to 64 MB (128MB for the LPx+ computer), however, when adding additional memory make sure to: ♦... -
Page 46: Lpx And Lpx+ Simm Socket Locations
Digital DECpc LPx/LPx+ Service Procedures LPx and LPx+ SIMM Socket Locations Figure 3 - 11 LPx and LPx+ SIMM Socket Locations MCS Logistics Engineering - Nijmegen... -
Page 47: Lpx 560/566 Memory Configurations
Service Procedures Digital DECpc LPx/LPx+ LPx 560/566 Memory Configurations The computer comes with at least 8 MB of memory. This amount can be increased up to 128 MB, however, when adding additional memory make sure to: ♦ Install 36-bit SIMMs having an access time of 70 ns or less. -
Page 48: Lpx 560/566 Simm Socket Locations
Digital DECpc LPx/LPx+ Service Procedures LPx 560/566 SIMM Socket Locations Figure 3 - 12 LPx 560/566 SIMM Socket Locations MCS Logistics Engineering - Nijmegen... -
Page 49: Removal Procedures
Service Procedures Digital DECpc LPx/LPx+ Removal Procedures Removing the 3½-Inch Diskette Drive To remove the 3½-inch diskette drive: Turn off the computer. Disconnect external devices, ac power, and monitor power. Unlock and remove outside cover. Disconnect power and ribbon cables. -
Page 50: Removing A 5¼-Inch Device
Digital DECpc LPx/LPx+ Service Procedures Removing a 5¼-Inch Device To remove a 5¼-Inch Device: NOTE The 3½-inch diskette drive and fan pipe must be removed prior to removing any 5¼-inch device. Turn off the computer. Disconnect external devices, ac power, and monitor power. -
Page 51: Removing A 3½-Inch Mass Storage Device (Internal Drive Bay)
Service Procedures Digital DECpc LPx/LPx+ Removing a 3½-Inch Mass Storage Device (Internal Drive Bay) To remove a 3½-Inch Mass Storage Device from the internal drive bay: Turn off the computer. Disconnect external devices, ac power, and monitor power. Unlock and remove outside cover. -
Page 52: Removing The Fan Pipe
Digital DECpc LPx/LPx+ Service Procedures Removing the Fan Pipe To remove the Fan Pipe: Turn off the computer. Disconnect external devices, ac power, and monitor power. Unlock and remove outside cover. Remove the 3½-Inch diskette drive. Remove CPU module retaining bracket. -
Page 53: Removing The Fan /Speaker Assembly
Service Procedures Digital DECpc LPx/LPx+ Removing the Fan /Speaker Assembly To remove the Fan /Speaker Assembly: Turn off the computer. Disconnect external devices, ac power, and monitor power. Unlock and remove outside cover. Remove fan and speaker connections from main logic board. -
Page 54: Removing The Main Logic Board
Digital DECpc LPx/LPx+ Service Procedures Removing the Main Logic Board To remove the main logic board: Turn off the computer. Disconnect external devices, ac power, and monitor power. Unlock and remove outside cover. Remove all connectors. Remove CPU module retaining bracket and CPU module. -
Page 55: Figure 3 - 19 Lpx+ Main Logic Board Connections
Service Procedures Digital DECpc LPx/LPx+ LPx+ Main Logic Board Connections Figure 3 - 19 LPx+ Main Logic Board Connections MCS Logistics Engineering - Nijmegen... -
Page 56: Lpx 560/566 Main Logic Board Connections
Digital DECpc LPx/LPx+ Service Procedures LPx 560/566 Main Logic Board Connections Figure 3 - 20 LPx 560/566 Main Logic Board Connections MCS Logistics Engineering - Nijmegen... -
Page 57: Removing The Cpu Module (Lpx 560/566)
Service Procedures Digital DECpc LPx/LPx+ Removing the CPU Module (LPx 560/566) CAUTION Before installing a new CPU module, update the computer’s BIOS. Do not wait to update the BIOS until after installing a new CPU module. To remove the CPU module: Turn off the computer. -
Page 58: Removing The Lpx(+) Power Supply
Digital DECpc LPx/LPx+ Service Procedures Removing the LPx(+) Power Supply To remove the power supply: Turn off the computer. Disconnect external devices, ac power, and monitor power. Unlock and remove outside cover. Remove screw securing power on/off cable from chassis. -
Page 59: Removing The Filler Panel
Service Procedures Digital DECpc LPx/LPx+ Removing the Filler Panel To remove the Filler Panel: Turn off the computer. Disconnect external devices, ac power, and monitor power. Unlock and remove outside cover. Carefully place screwdriver through hole provided at side of front access drive bay and release plastic locking tabs securing filler panel to front bezel. -
Page 60: Installation Procedures
Secondary cache memory is designed to improve the performance of the CPU and is installed in designated DIP sockets on the main logic board. For the DECpc LPx, secondary cache memory consists of four or eight 32 KB x 8 cache SRAM chips and three 16 KB x 4 cache tag SRAM chips. -
Page 61: Figure 3 - 24 Installing External Cache Memory
Service Procedures Digital DECpc LPx/LPx+ Figure 3 - 24 Installing External Cache Memory MCS Logistics Engineering - Nijmegen... -
Page 62: Installing A Higher Performance Cpu (Lpx/Lpx+)
Digital DECpc LPx/LPx+ Service Procedures Installing a Higher Performance CPU (LPx/LPX+) CAUTION Before installing a new CPU chip, update the computer BIOS. Do not wait to update the BIOS until after installing a new CPU chip. When installing an i486 microprocessor, make sure to align the chip with the outside row of pins visible. -
Page 63: Installing A Higher Performance Cpu (Lpx 560/566)
Service Procedures Digital DECpc LPx/LPx+ Installing a Higher Performance CPU (LPx 560/566) CAUTION Before installing a new CPU chip, update the computer BIOS. Do not wait to update the BIOS until after installing a new CPU chip. NOTE Earlier versions of the CPU module did not have a voltage regulator card (66 MHz version) as shown or jumper card (60 MHz version). -
Page 64: Replacement Procedures
Digital DECpc LPx/LPx+ Service Procedures Replacement Procedures Replacing the Computer Battery/Real Time Clock (RTC) (LPx) WARNING Make sure pin 1 on battery is correctly aligned with location on socket (see figure). Incorrect installation can cause faulty computer operation. To replace the computer battery/real time clock: Record computer configuration settings. -
Page 65: Replacing The Computer Battery (Lpx+)
Service Procedures Digital DECpc LPx/LPx+ Replacing the Computer Battery (LPx+) To replace the computer battery: Record computer configuration settings. Turn off the computer. Disconnect external devices, ac power, and monitor power. Unlock and remove outside cover. Remove battery. Install new battery (Toshiba CR2032 or equivalent). -
Page 66: Replacing The Computer Battery/Real Time Clock (Rtc) (Lpx 560/566)
Digital DECpc LPx/LPx+ Service Procedures Replacing the Computer Battery/Real Time Clock (RTC) (LPx 560/566) WARNING Make sure pin 1 on battery is correctly aligned with location on socket (see figure). Incorrect installation can cause faulty computer operation. To replace the computer battery/real time clock: Record computer configuration settings. -
Page 67: Connecting Diskette And Ide Devices
Service Procedures Digital DECpc LPx/LPx+ Connecting Diskette and IDE Devices To connect diskette and IDE devices, perform the following: Connect supplied ribbon cable to appropriate device as shown. Connect appropriate power cable to device. Replace and lock outside cover. Connect external devices and restore power. -
Page 68: Diskette/Ide Connections
Digital DECpc LPx/LPx+ Service Procedures Diskette/IDE Connections Legend Diskette Drive Component Power supply Power connections Diskette drive connection IDE drive connection Diskette drive Hard disk drive Optional storage devices Figure 3 - 30 Diskette/IDE Connections MCS Logistics Engineering - Nijmegen... -
Page 69: Connecting Scsi Devices
Service Procedures Digital DECpc LPx/LPx+ Connecting SCSI Devices To connect SCSI devices, perform the following: Connect supplied ribbon cable to appropriate device as shown: Connect appropriate power cable to device. Replace and lock outside cover. Connect external devices and restore power. -
Page 70: Chapter 4 Troubleshooting
Initial Troubleshooting Follow these general procedures to troubleshoot the DECpc LPx/LPx+ computer: ♦ Press [Ctrl] + [Alt] + [Del]. If the computer fails to boot, turn it off, wait until all hard disk drives spin down completely, and then turn it back on. -
Page 71: Troubleshooting
Troubleshooting Digital DECpc LPx/LPx+ Beep Codes If the POST finds an error and cannot display a message, the computer's speaker emits a series of beeps to indicate the error and places a value in I/O port 80h. For example, a failure of bit 3 in the first 64 KB of RAM is indicated by a 2-1-4 beep code (a burst of two beeps, a single beep, and a burst of four beeps). -
Page 72: Beep Codes For Non-Fatal Errors
Digital DECpc LPx/LPx+ Troubleshooting Beep Codes for Fatal Errors (continued) Beep Code Error Message Gate A20 failure 4-2-3 Unexpected interrupt in protected mode 4-2-4 4-3-1 RAM failure (above 0FFFFh) 4-3-3 Interval timer 2 failure Time-of-day clock failure 4-3-4 Serial port failure... - Page 73 Troubleshooting Digital DECpc LPx/LPx+ POST and Boot Messages (continued) Message Solution Replace main logic board. No timer tick Replace main logic board. Shutdown failure Timer 2 failure Replace main logic board. Keyboard stuck key Check the keyboard connection. If the connection is secure, the keyboard or keyboard controller might...
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Page 74: Computer Troubleshooting
Digital DECpc LPx/LPx+ Troubleshooting Computer Troubleshooting Problem Possible Cause Action No response Main logic board failure. Replace main logic board. when the computer is Main logic board jumpers Set all appropriate jumpers. incorrectly set. turned on Brightness and contrast controls Adjust the brightness and contrast controls. - Page 75 Troubleshooting Digital DECpc LPx/LPx+ Computer Troubleshooting (continued) Problem Possible Cause Action Operating system software is not Install the appropriate operating system. Computer does not boot from installed on the SCSI hard disk drive. an internal SCSI hard disk Requested partition does not...
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Page 76: Disk Drive Troubleshooting
Digital DECpc LPx/LPx+ Troubleshooting Computer Troubleshooting (continued) Problem Possible Cause Action Drive ID incorrectly set. Make sure the drive ID is correctly set (refer to the Computer does not boot from a documentation supplied with the diskette drive). target diskette drive Diskette drive not enabled. -
Page 77: Monitor Troubleshooting
Troubleshooting Digital DECpc LPx/LPx+ Monitor Troubleshooting Problem Possible Cause Action Monitor is turned off. Turn on the monitor. Monitor power indicator is not Power indicator is defective. Replace the failed component. Configuration error. Run the BIOS SETUP UTILITY to configure the No screen computer for VGA operation. -
Page 78: Qaplus/Fe Error Messages
Digital DECpc LPx/LPx+ Troubleshooting QAPlus/FE Error Messages Component Messages Solution Arithmetic Function Failed. Reset CPU. General Functions Failed. Replace CPU. Exception Interrupt in Protected Mode. Refresh Failure. Logic Functions Failed. Hard disk Butterfly Cylinder Access Test Low-level format hard disk. -
Page 79: Chapter 5 Device Mapping
Digital DECpc LPx/LPx+ Device Mapping Chapter 5 Device Mapping This section provides a series of tables listing mapping and address information related to computer memory and various main logic board devices (keyboard controller, interrupt controller, DMA controller, etc.). The computer's memory and address locations are allocated at the factory to operate within a standard PC environment. -
Page 80: Memory Map (Lpx 560/566 Full Range)
Device Mapping Digital DECpc LPx/LPx+ Memory Map (LPx 560/566 Full Range) Range Function Notes main memory PC compatibility range 0 KB to 512KB main memory PC compatibility range 512KB to 1024KB (1MB) EISA/ISA memory lower limit main memory EISA/ISA memory upper limit... -
Page 81: I/O Address Map (Lpx/Lpx+)
Digital DECpc LPx/LPx+ Device Mapping I/O Address Map (LPx/LPx+) Range (hexadecimal) Function DMA controller one 000 - 00F Interrupt controller one 020 - 021 Index register (85C461) Data register (85C461) Interval timer 040 - 043 Keyboard controller 060 - 06F... -
Page 82: I/O Address Map (Lpx 560/566)
Device Mapping Digital DECpc LPx/LPx+ I/O Address Map (LPx 560/566) Range (hexadecimal) Function Keyboard/mouse controller 060 to 064 Math co-processsor 0F0 to 0FF 1F0 to 1F7 IDE controller (if enabled) 278 to 27F LPT2 (if enabled) COM2 (if enabled) 2F8 to 2FF... -
Page 83: Computer Interrupt Levels (Lpx 560/566)
Digital DECpc LPx/LPx+ Device Mapping Computer Interrupt Levels (LPx 560/566) Interrupt Number Interrupt Source Keyboard controller IRQ1 COM2 (if enabled) IRQ3 IRQ4 COM1 (if enabled) IRQ6 Diskette drive (if enabled) LPT1, LPT2, LPT3 (if enabled) IRQ7 Mouse interrupt IRQ12 Math co-processor... -
Page 84: Chapter 6 Pass / Fail Criteria
OS/2 version 2.0 and later ◊ SCO Open Desktop Release 3 ◊ Windows NT (DECpc LPx+ with 12 MB client/ 16 MB server memory minimum recommended) ◊ SCO UNIX System V release 2.0 and later Remove any software that was put on the hard drive to enable repair of the system before shipping. -
Page 85: Appendix A Service Notes
Digital DECpc LPx/LPx+ Service Notes Appendix A Service Notes This appendix contains the service notes for the DECpc LPx/LPx+ series computer. MCS Logistics Engineering - Nijmegen... -
Page 86: Appendix B Useful Information
Digital DECpc LPx/LPx+ Useful Information Appendix B Useful Information Related Documentation Description Order’s DECpc LPx/LPx+ Quick Reference Guide EK-A0883-RG EK-A0815-RG SMM Spares Catalogue ER-800WW-IA DECpc LPx/LPx+ Installation Card (English) DECpc LPx/LPx+ Installation Card (French) ER-800WW-IP DECpc LPx/LPx+ Installation Card (Italian) -
Page 87: On-Line Bulletin Boards
Useful Information Digital DECpc LPx/LPx+ On-Line Bulletin Boards The most current product information and technical support is also available on line. The most current device drivers, Setup diskettes and technical tips can be found on all of these bulletin boards. -
Page 88: Document Feedback
Digital DECpc LPx/LPx+ Document Feedback Document Feedback If you have comments on the contents or layout of this document we highly appreciate your feedback. We will do our best to make this document a valuable support to your service efforts for Digital. -
Page 89: Readers Comments
READERS COMMENTS DECpc LPx/LPx+ Service Maintenance Manual K-MN-SD00000-19-JG00.A This form is for documents only. Commitments submitted on this form are used at Digital’s direction. Did you find errors in this manual? If so, specify by page............................................................................................................. What is your general reaction to this manual (format, completeness, organisation etc.)? ....................................
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