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Aspire Z3750 / Z3751 / Z5750 / Z5751 All-In-One Computer Service Guide Service guide files and updates are available on the Acer/CSD web site; for more information, go to http://csd.acer.com.tw PRINTED IN TAIWAN...
Revision History Refer to the table below for changes made on this version of the Aspire Z3750 / Z3751 / Z5750 / Z5751 All-In-One Computer Service Guide. Date Chapter Updates Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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CAUTION Gives precautionary measures to avoid possible hardware or software problems. IMPORTANT Reminds you to do specific actions relevant to the accomplishment of procedures. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
FRU list of this printed service guide. You MUST use the list provided by your regional Acer office to order FRU parts for repair and service of customer machines. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Features and Specifications This chapter lists the features and specifications of the Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO computer. NOTE The items listed in this section are for reference only. The exact configuration of your PC depends on the model purchased.
• Icons for the capacitive keys are only visible when the system is turned on. • The auxiliary lighting capacitive key is designed to provide a light source when using a keyboard in low-light conditions. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Icon Component Integrated webcam...
Microphone jack Item Icon Component Ethernet port (RJ-45) USB ports DVI to D-Sub port (optional) Monitor port (VGA) HDMI port PS/2 mouse port PS/2 keyboard port AC power jack Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Right and Rear Views Item Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Icon Component Mounting holes for wall mount option USB ports Microphone jack Headphone jack Kensington slot Computer stand...
Replace the RTC battery with a new one. NOTE For ease of reading, CMOS Setup Utility will be simply referred to as “Setup” or “Setup Utility” in this Service Guide. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Chapter 2...
Some options (marked with a ) lead to submenus that enable you to change the values for the option. Use the Up/Down/Left/Right arrow keys to scroll through the items in the submenu Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
• In the descriptive tables following each of the menu screen illustrations, settings in boldface are the default and suggested settings. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide • PC Health Status • Frequency/Voltage Control •...
System serial number. System BIOS Version Current system BIOS version BIOS Release Date Date when the CMOS setup utility was released. Asset Tag Number System asset tag number Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
No Errors - BIOS will ignore any errors detected during POST • All, but Keyboard - If a keyboard error is detected, BIOS will pause the system. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Value MM/DD/YYYY (month/day/year)
USB Beep Select whether to allow the BIOS to emit error beeps or display error Message messages during USB device enumeration. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Value Enabled Disabled Enabled...
(frame buffer) is allotted. Current UMA Size Displays the size of video memory (located in upper memory area–UMA) detected during boot-up. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide ® Boost and provides intelligent power Value...
Onboard LAN Enables or disables the onboard LAN controller. Controller Onboard LAN Enables or disables the onboard LAN option ROM function. Option ROM Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Value Enabled Disabled Native IDE Enabled...
• Last State - The computer reverts to the last power state before the power loss occurred. • On - The computer switches back on after the AC power loss. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Value S3 (STR)
CPU Core +1.1V +3.30V +5.00V +12.0V 5VSB VBAT Smart Fan When enabled, fan speed will speed up or slow down depending on the system temperature. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Value Enabled Disabled...
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Note: Remember to disable the Spread Spectrum feature if you are overclocking. A slight jitter can introduce a temporary boost in clock speed causing the overclocked processor to lock up. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Value Enabled...
When you are prompted to enter a password, you have three tries before the system halts. Do not forget your password. If you forget your password, you may have to return your computer to your dealer to reset Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Value...
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Press Enter twice without entering anything in the new and confirm password fields. You will be prompted to confirm the password removal. Press Enter. Press F10 to save the changes you made and close the Setup Utility. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Press F10 to save the changes you made and close the Setup Utility. Save & Exit Setup Execute this menu to save the changes made and closes the Setup Utility. Keyboard shortcut: F10 Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Exit Without Saving Execute this menu to closes the Setup Utility without making any changes. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Unplug the network cable and all connected peripheral devices from the computer. Place the computer on a flat, steady surface with the rear cover facing upward. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Chapter 3...
Use a flat screwdriver to pry off the plastic shell covering the computer stand screws. Remove the screws securing the computer stand. Quantity Color Black Torque Part Number 4.0–4.5 kgf-cm – Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Push on the areas highlighted on the below picture to disengage the rear cover from the chassis. Remove the rear cover. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Remove the rear cover by following the procedure described on the previous page. Remove the screw securing the B-CAS card bracket. Quantity Color Chrome Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Torque Part Number 4.0–4.5 kgf-cm 86.00B75.240...
Remove the rear cover by following the procedure described on page 30. Remove the screw securing the ODD. Quantity Color Black Torque Part Number 4.5 +/- 0.3 kgf-cm 86.00B75.240 Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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Slide the ODD outward, then disconnect the ODD SATA cable from the drive. Remove the ODD from the chassis. Remove the screw securing the ODD bracket. Quantity Color Silver Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Torque Part Number 2.0 +/- 0.2 kgf-cm 86.7A122.4R0...
Remove the rear cover by following the procedure described on page 30. Remove the screws securing the scaler board cover. Quantity Color Chrome Remove the scaler board cover. Torque Part Number 4.5 +/- 0.3 kgf-cm 86.00B75.240 Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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Remove the tape covering the HDMI cable connector. Disconnect all the cables from the scaler board. Remove the screws securing the scaler board. Quantity Color Chrome Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Torque Part Number 4.5 +/- 0.3 kgf-cm 86.00B75.240...
Remove the screw securing the USB/audio board cover. Quantity Color Chrome has been highlighted with a yellow rectangle as shown in the Torque Part Number 4.5 +/- 0.3 kgf-cm 86.00B75.240 Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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USB/audio board cover. Disconnect the two cables from the USB/audio board. Remove the screws securing the USB/audio board. Quantity Color Chrome Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Torque Part Number 4.5 +/- 0.3 kgf-cm 86.00B75.240...
Remove the scaler board by following the procedure described on page 34. Remove the tapes securing the speaker cables to the power supply unit. has been highlighted with a yellow rectangle as shown in the Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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Remove the screws securing the scaler board cover. Quantity Color Chrome Remove the speakers. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Torque Part Number 4.5 +/- 0.3 kgf-cm 86.00B75.240...
Remove the rear cover by following the procedure described on page 30. Remove the screws securing the wall mount plate. Quantity Color Chrome Remove the wall mount plate. Torque Part Number 4.5 +/- 0.3 kgf-cm 86.5A554.6R0 Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Chrome Slide the inverter board cover outward to disengage it from the chassis, then remove the cover. Disconnect all cables from the inverter board. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Torque Part Number 4.5 +/- 0.3 kgf-cm...
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Follow local regulations for disposing this type of circuit board. Torque Part Number 4.5 +/- 0.3 kgf-cm 86.00B75.240 has been highlighted with a yellow rectangle as shown in the Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Remove the two hex screws securing the DVI to D-Sub cable to the graphics card (a), then detach the cable from the card (b). Disconnect the HDMI cable from the graphics card as well (c). Quantity Color Chrome Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Torque Part Number 4.5 +/- 0.3 kgf-cm 86.80536.7R2...
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Follow local regulations for disposing this type of circuit board. Torque Part Number 4.5 +/- 0.3 kgf-cm 86.00B75.240 has been highlighted with a yellow rectangle as shown in the Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Remove the wall mount plate by following the procedure described on page 40. Remove the graphics card assembly by following the procedure described on page 43. Disconnect the power and SATA cables from the hard drive. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Torque Part Number 4.5 +/- 0.3 kgf-cm...
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Remove the screws securing the hard drive bracket. Quantity Color Chrome Torque Part Number 4.5 +/- 0.3 kgf-cm 86.00B75.240 Torque Part Number 4.5 +/- 0.3 kgf-cm 86.5A554.6R0 Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Disconnect the 4-pin and 24-pin ATX power cables from their mainboard connectors. Press the top portion of the cable’s retaining latch Pull the cable straight up from its connector. Disconnect the PSU extension cable. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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Remove the screw securing the PSU to it cage. Quantity Color Chrome Torque Part Number 4.5 +/- 0.3 kgf-cm 86.00B75.240 Torque Part Number 4.5 +/- 0.3 kgf-cm 86.5A554.6R0 Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Disconnect the HSF cable from its mainboard connector. Loosen the HSF's spring-loaded screws in a diagonally opposite pattern (an "X" pattern). Quantity Color Chrome Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Torque Part Number 6.0 +/- 0.5 kgf-cm –...
Remove the HSF assembly by following the procedure described on the previous section. Disengage the load lever from its latch, then rotate the load lever to the open position. Open the retention plate to expose the socket body. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Remove the wall mount plate by following the procedure described on page 40. Open the holding clips securing the memory modules (a), then remove the memory modules from the DIMM slots (b). Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Remove the HSF assembly, processor, and the memory modules by following the procedures described on pages 49–51. Disconnect the HDD and ODD SATA cables from the mainboard. Disconnect the rest of the cables connected to the mainboard. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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• The RTC battery has been highlighted with a yellow circle in the above image. Detach the RTC battery and follow local regulations for disposing it. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Torque Part Number 4.5 +/- 0.3 kgf-cm...
Remove the rear cover by following the procedure described on page 30. Remove the screws securing the side bezel. Quantity Color 11 (1–11) Chrome 2 (12–13) Torque Part Number 86.1A524.5R0 4.5 +/- 0.3 kgf-cm 86.5A554.6R0 Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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Push the plastic tabs securing the side bezel outward. Remove the side bezel. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Remove the screws securing the front bezel. Quantity Color Chrome Disconnect the webcam cable. Turn over the unit with the display screen facing up. Torque Part Number 3.0 +/- 0.3 kgf-cm 86.VA324.5R0 Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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The front bezel is still attached to the chassis by the cables connected to the capacitive LED board, Bluetooth module, and the light bars. Proceed to the succeeding sections to remove these three components. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Remove the front bezel by following the procedure described on page 56. Disconnect the capacitive LED board cable. Use a flat screwdriver to pry off the capacitive LED board from the front bezel. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Remove the tape protecting the Bluetooth module. Remove the Bluetooth module from the front bezel and turn it over to expose the cable connector underneath it. Disconnect the Bluetooth module cable. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Remove the front bezel by following the procedure described on page 56. Pull up the tabs securing the two light bars. Remove the light bars from the front bezel. Disconnect the light bars’ cables. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Remove the front bezel by following the procedure described on page 56. Use a flat screwdriver to pry off the power button from the speaker mesh cover. Remove the power button and the spring coil located underneath it. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Expose the bottom side of the cover to access the power button/LED cable. Remove the tape protecting the power button/LED cable. Push the tabs securing the power button/LED cable, then remove the cable. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
(c). Remove the screws securing the touchscreen control board. Quantity Color Chrome Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Torque Part Number 4.5 +/- 0.3 kgf-cm 86.00B75.240...
Remove the screws securing the LCD panel. Quantity Color Chrome has been highlighted with a yellow rectangle as shown in the Torque Part Number 4.5 +/- 0.3 kgf-cm 86.1A524.5R0 Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Remove the LCD panel by following the procedure described on the previous page. Disconnect the LCD LVDS cable, then pull the cable from the panel. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Torque Part Number 4.5 +/- 0.3 kgf-cm...
Removing the System Cables Remove the LCD panel by following the procedure described on the previous page. Remove the tapes securing the system cables, then release the cables from the chassis. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
System Check Procedures IMPORTANT The diagnostic tests described in this chapter are only intended to test Acer products. Non-Acer products, prototype cards, or modified options can give false errors and invalid system responses.
Go to flat mode with 4GB limit and GA20 enabled. Verify the bootblock checksum. Disable CACHE before memory detection. Execute full memory sizing module. Verify that flat mode is enabled. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Verify that the found flash part size equals the recovery file size. The recovery file size does not equal the found flash part size. Erase the flash part. Program the flash part. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Initializes different devices through DIM. See DIM Code Checkpoints section for more information. USB controllers are initialized at this point. Initializes DMAC-1 & DMAC-2. Initialize RTC date/time. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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Uninstall POST INT1Ch vector and INT09h vector. Deinitializes the ADM module. Prepare BBS for Int 19 boot. End of POST initialization of chipset registers. Save system context for ACPI. Passes control to OS Loader (typically INT19h). Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
IMPORTANT If your system fails after you make changes in the Setup menus, reboot the computer, enter Setup again and load Setup defaults to correct the error. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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Insert boot media in selected boot device NO ROM BASIC This message occurs on some systems when no bootable device can be detected. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
The IDE/ATAPI device configured as Master in the 3rd IDE controller failed an ATAPI Incompatible ATAPI compatibility test. This message is typically displayed when the BIOS is trying to detect and configure IDE/ATAPI devices in POST. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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This message can be reported by an ATAPI device using the S.M.A.R.T. error reporting standard. S.M.A.R.T. failure messages may indicate the need to replace the hard disk. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
BIOS POST could not initialize the Master Interrupt Controller. This may indicate a error problem with system hardware. Interrupt Controller-2 BIOS POST could not initialize the Slave Interrupt Controller. This may indicate a problem with system hardware. error Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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Unknown BIOS error. This message is displayed when language module is not present in the AMIBIOS8 Error code = 004Bh ROM. Floppy Controller Error in initializing legacy Floppy Controller. Failure Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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• Enter CMOS Setup and load the default settings. In Windows systems, check settings in Power Management Property of the Control Panel. • Reload software from Recovery CD. • IDE disk drives • See “Undetermined Problems”. • Mainboard Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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Make sure the optical disc drive is configured correctly in CMOS Setup, the cable/jumper are set correctly and the drive’s optical lens is clean before diagnosing any optical drive problems. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Action/FRU •...
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• Load default settings (if screen is readable). • Mainboard • Monitor signal connection/cable • Monitor • Video adapter card • Mainboard • Monitor signal connection/cable • Video adapter card • Mainboard Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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No system power, or power supply fan is not running. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Action/FRU • Ensure the printer driver is properly installed. Refer to the printer service manual.
BIOS may be corrupt. • Something is wrong with the mainboard. BIOS damaged. Processor jump to boot block to execute the default procedure. CMOS checksum error Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Press F9 to load the system default settings. Select Ok, then press Enter. Press F9 to save the default settings and close the Setup utility. Select Ok, then press Enter. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
18. Press F9 to load the system default values. 19. Press F10 to save the changes you made and close the Setup Utility. to turn on the computer. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
System Architecture This chapter shows the block diagram and board layout of the Aspire Z3750 / Z3751 / Z5750 / Z5751 computer. Block Diagram The core subsystems of the Aspire Z3750 / Z3751 / Z5750 / Z5751 computer are depicted in the following block diagram.
Left panel audio jacks (line-in, line-out, and microphone jacks) Left: Ethernet port Right: USB ports USB ports Monitor port HDMI port Left: PS/2 mouse port Right: PS/2 keyboard port 4-pin ATX power connector Processor socket Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
Field Replaceable Unit (FRU) List This chapter gives you the FRU (Field Replaceable Unit) listing of the Aspire Z3750 / Z3751 / Z5750 / Z5751 computer global configurations. Refer to this list when ordering for repair parts or for RMA (Return Merchandise Authorization).
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GLUE FOR GLASS PANEL LEFT AND RIGHT 23 GLUE FOR GLASS PANEL TOP AND LOWER 23 SPRING FOR POWER KNOB TOUCH PANEL MYLAR (for Aspire Z3751and Z5751 models only) Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide Part Number MS.11200.072 MS.11200.071 86.5A5B6.012 86.00J07.B60...
Appendix A Model Definitions and Configurations This appendix provides features summary for each of the Aspire Z3750 / Z3751 / Z5750 / Z5751 computer model configurations. Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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Aspire Z3750 / Z3751 / Z5750 / Z5751 Model Configurations Common model features • Project name: aGallagher • Mainboard: aGallagher FH57MK _1394(N)_Logo(N)_EuP(Y) • Card reader: Yes Model Acer Base Description Chassis Bezel Unit AZ3750 PW.S AAP001 AZ3750 CH AAP001 HX093T AAIO EX02.
Refer to the following lists for components, adapter cards, and peripherals which have passed these tests. Regarding configuration, combination and test procedures, please refer to the Aspire Z3750 / Z3751 / Z5750 / Z5751 Vista Compatibility Test Report released by the Acer Mobile System Testing Department.
This appendix describes online technical support services available to help you repair your Acer products. If you are a distributor, dealer, ASP or TPM, please refer your technical queries to your local Acer branch office. Acer branch offices and regional business units can access our website. However some information sources will require a user ID and password.
58 function cable, part number 98 lens, part number 98 location 3 card reader Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide location 4 supported cards 1 chassis, part number 98 checkpoints boot block 68...
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100 port 4 LAN port location 4 specifications 7 LCD brightness control keys 3 LCD LVDS cable remove 65 LCD panel LVDS cable, part number 98 Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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4 part number 95 remove 32 SATA cable, part number 98 specifications 7 Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide troubleshooting 79 part numbers AC power cord 99 Bluetooth cable 99 Bluetooth module 93...
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23 remove 23 set 23 system time 15 system views front view 3 left view 4 rear view 5 right view 5 temperature monitoring 20 touchscreen Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...
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99 location 3 module, part number 93 module, remove 61 specifications 8 wireless LAN antennas, part number 93 cable, part number 99 module, part number 93 specifications 8 Aspire Z3750 / Z3751 / Z5750 / Z5751 AIO Computer Service Guide...