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Acer Aspire X3990 Acer Aspire X3990 Desktop Service Guide - Page 55

Remove the two screws that secure the I/O&USB board to the bracket.

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4. Remove the front I/O&USB board. a. Remove the two screws that secure the I/O&USB board to the bracket. b. Pull the I/O&USB board out of the bracket. Note:Circuit boards >10 cm² has been highlighted with the yellow rectangle as above image shows. Please detach the Circuit boards and follow local regulations for disposal. 47 Chapter 3

Section	Page
Aspire X3990 Service Guide	1
Revision History	2
Copyright	3
Disclaimer	4
Conventions	5
Table of Contents	7
System Tour	9
Features	9
Block Diagram	12
System Components	13
Front Panel	13
Rear Panel	14
Hardware Specifications and Configurations	15
Power Management Function(ACPI support function)	19
System Utilities	20
CMOS Setup Utility	20
Entering CMOS setup	21
Navigating Through the Setup Utility	21
Setup Utility Menus	22
Main	22
Advanced	23
Power	28
Security	29
Boot Options	30
Exit	31
System Disassembly and Assembly	32
Disassembly Requirements	32
Pre-disassembly Procedure	33
Removing the Side Panel	34
Removing the Heat Sink Fan Assembly	35
Removing the Processor	37
Removing the TV-Tuner Card	39
Removing the VGA Card	40
Removing the Front Bezel	41
Removing the Cage of ODD and HDD	42
Removing the Hard Disk Drive	45
Removing the Optical Drive	46
Removing the Memory Modules	47
Removing the Power Supply	48
Removing the Mainboard	50
Removing the Front I/O&USB and Card Reader Boards	53
Assembly Requirements	56
Assembly Procedure	57
Install the Processor	58
Install the Memory	59
Install the Heat Sink Fan Assembly	60
Removing the Side Panel	61
Removing the Front Bezel	62
Removing the Cage of ODD and HDD	63
Install the Power Supply	64
Install the I/O Shielding	65
Install the Main Board	66
Connect the Cable	67
Install the Optica Drive	69
Install the Hard Disk Drive	70
Install the Cage of ODD and HDD	71
Install the Front Bezel	73
Install the VGA Card	74
Install the TV-Tuner Card	75
Install the Side Panel	76
System Troubleshooting	77
Hardware Diagnostic Procedure	77
System Check Procedures	78
Power System Check	78
System External Inspection	78
System Internal Inspection	78
Beep Codes	79
Checkpoints	80
Viewing BIOS checkpoints	80
Bootblock Initialization Code Checkpoints	80
Bootblock Recovery Code Checkpoints	82
BIOS Recovery	83
Jumper and Connector Information	84
M/B Placement	84
Jumper Setting	86
Setting Jumper	86
FRU (Field Replaceable Unit) List	93
Aspire X3990 Exploded Diagram	94

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