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Acer Aspire X3475 Acer Aspire X3475 Desktop Service Guide - Page 26

Miscellaneous, Parameter, Description, Option, Enabled, Disabled

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Miscellaneous Parameter AHCI Port0/1/2 Spread Spectrum Bootup Num-lock Description Displays the status of auto detection of the AHCI device. Enables or disables the reduction of the mainboard's EMI. 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. Selects power on state for Num Lock. USB Beep Message Enables or disables BIOS to display error beeps or messages during USB device enumeration. Option Enabled Disabled On Off Enabled Disabled 18 Chapter 2

Section	Page
Aspire X3475 Service Guide	1
Revision History	2
Copyright	3
Disclaimer	4
Conventions	5
Table of Contents	7
System Tour	9
Features	9
Block Diagram	13
System Components	14
Front Panel	14
Rear Panel	15
Hardware Specifications and Configurations	16
Power Management Function(ACPI support function)	20
System Utilities	21
CMOS Setup Utility	21
Entering CMOS setup	22
Navigating Through the Setup Utility	22
Setup Utility Menus	23
Main for P01-A0(DB.SKJ11.001)	23
Main for P11-A0(DB.SLV11.001)	24
Advanced	25
Power	30
Authentication(For Win8 only)	31
Security	32
Boot Options	33
Exit	34
System Disassembly and Assembly	35
Disassembly Requirements	35
Pre-disassembly Procedure	36
Removing the Side Panel	37
Removing the Front Bezel	38
Removing the Heat Sink Fan Assembly	39
Removing the Processor	42
Removing the HDD-ODD Bracket	44
Removing the Optical Drive and the Hard Disk Drive	45
Detaching the Front Bezel	49
Removing the Wireless Lan Card	50
Removing the VGA Card	51
Removing the Memory Modules	52
Removing the Power Supply	53
Removing the Mainboard	55
Removing the USB, Audio and Card Reader Boards	58
Assembly Requirements	62
Assembly Procedure	63
Removing the Side Panel	64
Removing the Front Bezel	65
Removing the HDD-ODD Bracket	66
Reinstalling the I/O Shielding	67
Reinstalling the MainBoard	68
Reinstalling the Power Supply	70
Reinnstalling the Memory	72
Reinstalling the Front Bezel Power Button/LED Cable	74
Reinstalling the VGA Card	75
Reinstalling the Wireless Lan Card	76
Reinstalling the Optical Drive and the Hard Disk Drive	77
Reinstalling the HDD-ODD Bracket	81
Reinstalling the Processor	82
Reinstalling the Heat Sink Fan Assembly	84
Reinstalling the Front Bezel	86
Reinstalling the Side Panel	87
System Troubleshooting	88
Hardware Diagnostic Procedure	88
System Check Procedures	89
Power System Check	89
System External Inspection	89
System Internal Inspection	89
Beep Codes	90
Checkpoints	91
Viewing BIOS checkpoints	91
Bootblock Initialization Code Checkpoints	91
Bootblock Recovery Code Checkpoints	93
BIOS Recovery	94
Jumper and Connector Information	95
M/B Placement	95
Jumper Setting	97
Internal Header Pin Definition	98
Connector Pin Definition	101
FRU (Field Replaceable Unit) List	104
Aspire X3475 Exploded Diagram	105
Aspire X3475 FRU List	107

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