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Acer Aspire 7720 Aspire 7720 / 7720G Service Guide - Page 72

Remove the three screws fastening the subwoofer to the lower case., Remove the subwoofer

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20. Remove the three screws fastening the subwoofer to the lower case. 21. Remove the subwoofer from the lower case as shown. 66 Chapter 3

Section	Page
Features	7
System Block Diagram	10
Board Layout	11
Top View	11
Bottom View	12
Your Acer Notebook Tour	13
Front View	13
Closed Front View	14
Left View	15
Right View	16
Rear view	16
Base view	17
Indicators	17
Easy-Launch Buttons	18
Touchpad Basics	19
Using the Keyboard	20
Lock Keys and embedded numeric keypad	20
Windows Keys	21
Hot Keys	21
Special Key	22
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	45
Navigating the BIOS Utility	46
Information	47
Main	48
Security	50
Advanced	54
Boot	55
Exit	56
BIOS Flash Utility	57
General Information	60
Before You Begin	60
Disassembly Procedure Flowchart	61
Removing the Battery Pack	63
Removing the HDD Module/Memory/Wireless LAN Card/Modem Card/ TV Tuner Card/System Fan/Thermal Modules/VGA Board/CPU/ Keyboard and the LCD Module	64
Removing the HDD Module	64
Removing the Memory	64
Removing the Wireless LAN Card/Modem Card and TV Tuner Card	65
Removing the System Fan/Thermal Modules/VGA Board and CPU	66
Removing the Keyboard and LCD Module	67
Disassembling the Main Unit	69
Separate the Main Unit Into the Upper and the Lower Case Assembly	69
Disassembling the Lower Case Assembly	70
Disassembling the Upper Case Assembly	73
Disassembling the LCD Module	74
Disassembling the External Modules	76
Disassembling the HDD Module	76
Disassembling the ODD Module	76
System Check Procedures	78
External Diskette Drive Check	78
External CD-ROM Drive Check	78
Keyboard or Auxiliary Input Device Check	78
Memory check	79
Power System Check	79
Touchpad Check	81
Power-On Self-Test (POST) Error Message	82
Index of Error Messages	83
Phoenix BIOS Beep Codes	86
Index of Symptom-to-FRU Error Message	90
Intermittent Problems	93
Undetermined Problems	94
Top View	95
Bottom View	96
Aspire Poyang Exploded Diagram	98

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