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Acer 5920-6661 Service Guide - Page 76

Check the Power Adapter, An audible noise from the power adapter does not always indicate a defect.

UPC - 099802043124

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Check the Power Adapter Unplug the power adapter cable from the computer and measure the output voltage at the plug of the power adapter cable. See the following figure: Pin 1: +19 to +20.5V Pin 2: 0V, Ground 1. If the voltage is not correct, replace the power adapter. 2. If the voltage is within the range, do the following: T Replace the System board. T If the problem is not corrected, see "Undetermined Problems" on page 84. T If the voltage is not correct, go to the next step. NOTE: An audible noise from the power adapter does not always indicate a defect. 3. If the power-on indicator does not light up, check the power cord of the power adapter for correct continuity and installation. 4. If the operational charge does not work, see "Check the Battery Pack" on page 71. 70 Chapter 4

Section	Page
Features	7
System Block Diagram	11
Board Layout	12
Top View	12
Bottom View	13
Your Acer Notebook tour	14
Front View	14
Closed Front View	15
Left View	16
Right View	17
Rear view	17
Base view	18
Indicators	18
Easy-Launch Buttons	19
Touchpad Basics	20
Using the Keyboard	21
Lock Keys and embedded numeric keypad	21
Windows Keys	21
Hot Keys	22
Special Key	23
Acer Empowering Technology	24
Empowering Technology password	24
Acer eNet Management	24
Acer ePower Management	26
Acer ePresentation Management	27
Acer eDataSecurity Management	28
Acer eLock Management	30
Acer eRecovery Management	31
Acer eSettings Management	32
Using the System Utilities	34
Acer GridVista (dual-display compatible)	34
Launch Manager	35
Hardware Specifications and Configurations	36
BIOS Setup Utility	43
Navigating the BIOS Utility	44
Information	45
Main	46
Security	48
Boot	52
Exit	53
BIOS Flash Utility	54
General Information	56
Before You Begin	56
Disassembly Procedure Flowchart	57
Removing the Battery Pack	59
Removing the HDD Modules/ODD Module/Memory/Wireless LAN Card/VGA Board/Thermal Module and the LCD Module	60
Removing the HDD Module	60
Removing the ODD Module	60
Removing the Memory and Wireless LAN Card	60
Removing the VGA Board and Thermal Module	61
Removing the Keyboard and LCD Module	63
Disassembling the Main Unit	65
Separate the Main Unit Into the Upper and the Lower Case Assembly	65
Disassembling the Lower Case Assembly	65
Disassembling the Upper Case Assembly	68
Removing the Touchpad Board	68
Removing the Launch Key Board	69
Removing the Speaker	69
Disassembling the LCD Module	70
Disassembling the External Modules	71
Disassembling the HDD Module	71
Disassembling the ODD Module	71
System Check Procedures	74
External Diskette Drive Check	74
External CD-ROM Drive Check	74
Keyboard or Auxiliary Input Device Check	74
Memory check	75
Power System Check	75
Touchpad Check	77
Power-On Self-Test (POST) Error Message	78
Index of Error Messages	79
Phoenix BIOS Beep Codes	82
Index of Symptom-to-FRU Error Message	86
Intermittent Problems	89
Undetermined Problems	90
Top View	91
Bottom View	92
Aspire Chapla Exploded Diagram	94

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