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Acer Aspire X3400G Acer Aspire X3400, X3400G Desktop Service Guide - Page 56

Remove the six screws D that secure the mainboard., Lift the board off the housing

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11. Remove the six screws (D) that secure the mainboard. Screw (Quantity) #6-32 L6 NI (6) Color Silver Torque 5.7 to 6.3 kgf-cm Part No. 86.00J44.C60 NOTE: The mainboard has been highlighted with a yellow rectangle as above image shows. Please detach the mainboard and follow local regulations for disposal. 12. Lift the board off the housing. X3400 X5400 48 Chapter 3

Section	Page
Table of Contents	7
System Tour	9
Features	9
System Components	12
Front Panel	12
Rear Panel	14
Internal Components	16
System LED Indicators	17
System Utilities	19
CMOS Setup Utility	19
Entering CMOS setup	20
Navigating Through the Setup Utility	20
Setup Utility Menus	21
System Disassembly	35
Disassembly Requirements	35
Pre-disassembly Procedure	36
Main Unit Disassembly	37
Removing the Side Panel	39
Removing the Front Bezel	40
Removing the Heatsink Fan Assembly	42
Removing the Processor	43
Removing the Optical Drive	44
Removing the Hard Disk Drive	46
Removing the Power Supply	47
Removing the Memory Modules	49
Removing an Expansion Card	50
Removing the Front I/O and Card Reader Boards	52
Removing the Mainboard	55
Removing the Top Bezel	57
System Troubleshooting	59
Hardware Diagnostic Procedure	59
System Check Procedures	60
Power System Check	60
System External Inspection	60
System Internal Inspection	60
Checkpoints	61
Viewing BIOS checkpoints	61
Bootblock Initialization Code Checkpoints	61
Bootblock Recovery Code Checkpoints	62
POST Code Checkpoints	63
DIM Code Checkpoints	65
Beep Codes	66
Boot Block Beep Codes	66
POST BIOS Beep Codes	66
Error Messages	68
Memory	68
Boot	68
Storage Device	69
Virus Related	70
System Configuration	71
CMOS	72
Miscellaneous	72
USB eModule Error Messages	73
SMBIOS eModule Error Messages	73
CPU eModule Error Messages	73
MPS Table (Multi-processor) eModule Error Messages	73
BIOS Recovery	74
Undetermined Problems	76
System Block Diagram and Board Layout	77
System Block Diagram	77
Board Layout	78
Mainboard	78
FRU (Field Replaceable Unit) List	81
Exploded Diagram	82
X3400 FRU List	84
X5400 FRU List	87

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