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Acer Aspire 5542 Acer Aspire 5542 Notebook Series Service Guide - Page 123

Clearing Password Check and BIOS Recovery, Clearing Password Check

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Clearing Password Check and BIOS Recovery This section provides the standard operating procedures for clearing the password and BIOS recovery for the system. There is one Hardware Open Gap on the main board for clearing the password check and one Hotkey for enabling BIOS Recovery. Clearing Password Check Hardware Open Gap Description Hardware Gap Default Setting Open (Normal) Operation Description Short (Clearing Password Check) Hardware Gap Position on the Main Board Gap name in Aspire 5738DG/5738DZG Series and Aspire 5738G/5738ZG/5738Z/5738/5338 Series is G78. Chapter 5 G78 115

Section	Page
Features	9
Dimension and weight	11
System Block Diagram	12
Your Acer Notebook tour	15
Right View	18
Indicators	20
Easy-Launch Buttons	20
Touchpad basics (with two-click buttons)	20
Using the Keyboard	21
Lock Keys and embedded numeric keypad	21
Windows Keys	22
Hot Keys	23
Special Key (only for certain models)	24
Using the System Utilities	25
Acer GridVista (dual-display compatible)	25
Hardware Specifications and Configurations	27
BIOS Setup Utility	35
Navigating the BIOS Utility	36
Information	37
Main	39
Security	41
Boot	45
Exit	46
BIOS Flash Utility	47
Remove HDD Password	48
Disassembly Requirements	49
General Information	50
Pre-disassembly Instructions	50
Disassembly Process	50
External Module Disassembly Process	51
External Modules Disassembly Flowchart	51
Removing the Battery Pack	52
Removing the SD Dummy Card	53
Removing the DIMM Module	54
Removing the Back Cover	55
Removing the Hard Disk Drive Module	56
Removing the WLAN Modules	59
Removing the Optical Drive Module	61
Main Unit Disassembly Process	63
Main Unit Disassembly Flowchart	63
Removing the Middle Cover	64
Removing the Keyboard	66
Removing the LCD Module	67
Separating the Upper Case from the Lower Case	70
Removing the Fingerprint and Touchpad Boards	74
Removing the Left Speaker Module	77
Removing the USB Board Module	78
Removing the Modem Module	80
Removing the Bluetooth Module	81
Removing the Right Speaker Module	83
Removing the Main Board	85
Removing the Heatsink Module	87
Removing the CPU	89
LCD Module Disassembly Process	91
LCD Module Disassembly Flowchart	91
Removing the LCD Bezel	92
Removing the Inverter Board (Aspire 5738DG/5738DZG Series only)	94
Removing the LCD panel with the Brackets	96
Removing the LCD Brackets	97
Removing the FPC Cable	98
Removing the Antennas	100
Removing the Web Camera	102
System Check Procedures	104
External Diskette Drive Check	104
External CD-ROM Drive Check	104
Keyboard or Auxiliary Input Device Check	104
Memory Check	105
Power System Check	105
Touchpad Check	106
Power-On Self-Test (POST) Error Message	106
Index of Error Messages	107
Phoenix BIOS Beep Codes	110
Index of Symptom-to-FRU Error Message	115
Intermittent Problems	119
Undetermined Problems	120
Main Board	121
Clearing Password Check and BIOS Recovery	123
Clearing Password Check	123
BIOS Recovery by Crisis Disk	125
Exploded Diagram	130
FRU List	131
Model Definition and Configuration	222
Aspire 5738G/5738ZG/5738Z/5738/5338 Series	223
Aspire 5536/5536G/5236 Series	243
Aspire 5738DG/5738DZG Series	257
Aspire 5542G/5542/5242 Series	271
Microsoft® Windows® Environment Test	300
Online Support Information	303

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