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Acer AO756 Acer Aspire One 756 Netbook Service Guide - Page 84

Internal Keyboard Failure

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Internal Keyboard Failure If the internal keyboard fails, perform the following: Start OK Keyboard FPC NG well connected? OK Connect it well Keyboard OK? NG OK Replace M/B Replace keyboard Figure 4:4. Internal Keyboard Failure 4-7 Troubleshooting

Section	Page
Table of Contents	2
General Information	7
Hardware Specifications and Configurations	9
Features	9
Notebook Tour	13
Top View	13
Front View	14
Left View	15
Right View	16
Base View	17
Touchpad Basics	18
Keyboard Basics	19
System Block Diagram	22
Specifications Table	23
System Utilities	43
BIOS Setup Utility	43
Navigating the Bios Setup Utility	43
BIOS	44
Information	44
Main	46
Security	47
Boot	51
Exit	52
BIOS Flash Utilities	53
DOS Flash Utility	54
WinFlash Utility	57
Miscellaneous Tools	60
Using DMI Tools	60
HDD/BIOS Password	62
Unlocking the HDD	62
Clearing the Password Check and BIOS Password	64
Crisis Utility SOP	66
When to Use the Crisis SOP	66
Creating a USB Flash Crisis Disk	66
Using the Crisis Utility Disk	69
Jumper and Connector Locations	72
Mainboard Top View	72
Mainboard Bottom View	73
LED Board View	74
IO Board View	75
HDD Board View	76
Clear CMOS Jumper	77
Troubleshooting	79
General Information	79
Power On Issues	80
No Display Issues	81
LCD Picture Failure	83
Internal Keyboard Failure	84
Touchpad Failure	85
Internal Speaker Failure	86
Internal Microphone Failure	88
USB Failure (USB 2.0)	89
Wireless/BT Function Test Failure	90
2-in-1 Card Function Test Failure	91
Unit Thermal Failure	92
Cosmetic Failure	93
Other Functions Failure	94
BIOS Problems	94
Intermittent Problems	95
Undetermined Problems	95
Service and Maintenance	98
Introduction	98
Recommended Equipment	98
Maintenance Flowchart	99
Getting Started	101
Battery Pack Removal	102
Battery Pack Installation	103
Dummy Card Removal	104
Dummy Card Installation	105
Base Door Removal	106
Base Door Installation	108
HDD Module Removal	110
HDD Module Installation	111
HDD Board Removal	112
HDD Board Installation	114
Fan Removal	116
Fan Installation	118
DIMM Module Removal	120
DIMM Module Installation	121
WLAN Module Removal	122
WLAN Module Installation	124
Upper Case Removal	126
Upper Case Installation	131
Mainboard Removal	134
Mainboard Installation	136
IO Board Removal	138
IO Board Installation	140
LED Board Removal	142
LED Board Installation	144
Speaker Removal	146
Speaker Installation	148
Keyboard Removal	150
Keyboard Installation	152
Touchpad Removal	154
Touchpad Installation	156
Thermal Module Removal	158
Thermal Module Installation	159
LCD Module Removal	161
LCD Module Installation	164
DC-In Cable Removal	167
DC-In Cable Installation	168
LCD Bezel Removal	169
LCD Bezel Installation	171
LCD Panel Removal	173
LCD Panel Installation	177
CCD Module Removal	181
CCD Module Installation	182
LCD Panel Brackets Removal	183
LCD Panel Brackets Installation	184
Microphone Removal	185
Microphone Installation	186
WLAN Antenna (Main) Removal	187
WLAN Antenna (Main) Installation	189
WLAN Antenna (Auxiliary) Removal	191
WLAN Antenna (Auxiliary) Installation	192
FRU (Field Replaceable Unit) List	194
Exploded Diagram	195
Main Assembly	195
Lower Case Assembly	197
Upper Case Assembly	198
LCD Assembly	200
HDD Assembly	202
FRU List	203
Screw List	210
Test Compatible Components	213
Microsoft® Windows® 7 Environment Test	213
AO756 / V5-171	213
Online Support Information	218

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