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Acer Aspire 8940G Acer Aspire 8940 Service Guide - Page 206

Built-In Keyboard Failure, If the built-in, fails

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Built-In Keyboard Failure If the built-in Keyboard fails, perform the following actions one at a time to correct the problem. Do not replace non-defective FRUs: START Keyboard FPC well connected? No Connect it well Keyboard OK? No Replace keyboard Replace M/B 196 Chapter 4

Section	Page
System Specifications	11
Features	11
System Block Diagram	14
Your Acer Notebook tour	15
Front View	15
Closed Front View	17
Rear View	17
Left View	18
Right View	19
Bottom View	20
TouchPad Basics	21
Using the Keyboard	22
Key Types	22
Windows Keys	23
System Hotkeys	24
Using the System Utilities	25
Acer GridVista (dual-display compatible)	25
Hardware Specifications and Configurations	26
System Utilities	41
BIOS Setup Utility	41
Navigating the BIOS Utility	41
Information	42
Main	43
Security	44
Boot	47
Exit	48
BIOS Flash Utilities	49
DOS Flash Utility	50
WinFlash Utility	52
Remove HDD/BIOS Password Utilities	53
Machine Disassembly and Replacement	59
Disassembly Requirements	59
General Information	60
Pre-disassembly Instructions	60
Disassembly Process	60
External Module Disassembly Process	61
External Modules Disassembly Flowchart	61
Removing the Battery Pack	62
Removing the Express Dummy Card	63
Removing the SD Dummy Card	64
Removing the Lower Door	65
Removing the Optical Drive Module	66
Removing the Primary Hard Disk Drive Module	68
Removing the Secondary Hard Disk Drive Module	70
Removing the DIMM Modules	72
Removing the TV Tuner Module	73
Removing the WLAN Module	75
Main Unit Disassembly Process	77
Upper Cover Disassembly Flowchart	77
Lower Cover Disassembly Flowchart	78
Removing the Keyboard	79
Removing the Switch Cover	81
Removing the Power Board	83
Removing the LCD Module	84
Removing the Upper Cover	87
Removing the Launch Board	91
Removing the Volume Control Board	92
Removing the Power Saving Board FFC	94
Removing the Media Board	95
Removing the TouchPad Lock Board	97
Removing the Finger Print Reader Bracket	99
Removing the TouchPad Board	100
Removing the RTC Battery	103
Removing the Bluetooth Board	104
Removing the USB Board	106
Removing the Power Saving Board	108
Removing the Mainboard	109
Removing the Kensington Lock Bracket	111
Removing the TV Tuner Antenna	112
Removing the Subwoofer	113
Removing the Hinge Supports	115
Removing the Speaker Module	116
Removing the Thermal Module	117
Removing the Graphics Card Heatsink	118
Removing the Graphics Card	119
Removing the CPU	120
LCD Module Disassembly Process	121
Standard Bezel LCD Module Disassembly Flowchart	121
Removing the Standard LCD Bezel	122
Removing the LCD Panel	125
Removing the Camera Board	127
Removing the LCD Brackets and FPC Cable	128
Flush Bezel LCD Module Disassembly Flowchart	130
Removing the Flush LCD Bezel Cap	131
Removing the Flush LCD Bezel	133
Removing the LCD Panel	135
Removing the Camera Board	137
Removing the LCD Brackets and FPC Cable	138
LCD Module Reassembly Procedure	140
Standard Bezel LCD Module Reassembly-LCD Panel	140
Replacing the LCD Bezel	144
Flush Bezel LCD Module Reassembly-LCD Panel	146
Replacing the LCD Bezel	150
Replacing the Flush LCD Bezel Cap	152
Main Module Reassembly Procedure	154
Replacing the CPU	154
Replacing the Graphics Card	155
Replacing the Graphics Card Heatsink	156
Replacing the Thermal Module	157
Replacing the Speaker Module	158
Replacing the Hinge Supports	159
Replacing the Subwoofer	160
Removing the TV Tuner Antenna	162
Removing the Kensington Lock Bracket	163
Replacing the Mainboard	163
Removing the Mainboard	164
Replacing the Power Saving Board	165
Replacing the USB Board	166
Replacing the Bluetooth Board	168
Replacing the RTC Battery	170
Replacing the TouchPad Board	171
Replacing the Finger Print Reader Bracket	174
Replacing the TouchPad Lock Board	175
Replacing the Media Board	177
Replacing the Power Saving Board FFC	178
Replacing the Volume Control Board	179
Replacing the Launch Board	181
Replacing the Upper Case	182
Replacing the LCD Module	185
Replacing the Power Board	189
Removing the Switch Cover	190
Replacing the Keyboard	192
External Module Reassembly Instructions	194
Replacing the WLAN Module	194
Replacing the TV Tuner Module	195
Replacing the DIMM Modules	196
Replacing the Hard Disk Drive Module	196
Replacing the ODD Module	197
Replacing the Lower Covers	197
Replacing the SD Dummy Card	199
Replacing the Battery	199
Troubleshooting	201
Common Problems	201
Power On Issue	202
No Display Issue	203
Random Loss of BIOS Settings	204
LCD Failure	205
Built-In Keyboard Failure	206
TouchPad Failure	207
Internal Speaker Failure	208
Internal Microphone Failure	209
HDD Not Operating Correctly	210
USB (Right Up/Down Side) Failure	211
Other Failures	211
Intermittent Problems	211
Undetermined Problems	212
Post Codes	213
Chipset POST Codes	213
Jumper and Connector Locations	217
Top View	217
Bottom View	218
Clearing Password Check and BIOS Recovery	219
Clearing Password Check	219
BIOS Recovery by Crisis Disk	220
FRU (Field Replaceable Unit) List	221
Aspire 8940 Exploded Diagrams	222
Main Chassis	222
LCD Assembly	223
Aspire 8940 FRU List	224
Screw List	232
Model Definition and Configuration	234
Aspire 8940 Series	234
Test Compatible Components	249
Microsoft® Windows® 7 Environment Test	250
Online Support Information	275

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