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Acer Aspire E1-521 Acer Aspire E1-521 Notebook Service Guide - Page 88

Internal Keyboard Failure

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Internal Keyboard Failure If the internal keyboard fails, perform the following: Start OK Check KB FPC well insert NG OK Re-assemble the KB FPC to M/B Is KB ok? OK Swap M/B NG Replace KB material 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
Boot Manager	53
BIOS Flash Utilities	54
DOS Flash Utility	55
WinFlash Utility	58
Miscellaneous Tools	61
Using DMI Utility	61
Using the LAN MAC EEPROM Utility	63
HDD/BIOS Password	65
Unlocking the HDD	65
Clearing the Password Check and BIOS Password	67
Crisis Utility SOP	70
When to Use the Crisis SOP	70
Creating a USB Flash Crisis Disk	70
Using the Crisis Utility Disk	72
Jumper and Connector Locations	75
Mainboard Top View	75
Mainboard Bottom View	77
USB Board View	78
Power Board View	79
ODD Board View	80
CMOS Jumper	81
Troubleshooting	83
General Information	83
Power On Issues	84
No Display Issues	85
LCD Picture Failure	87
Internal Keyboard Failure	88
Touchpad Failure	89
Internal Speaker Failure	90
Internal Microphone Failure	92
USB Failure	93
Wireless Function Failure	94
4-in-1 Card Function Failure	95
Unit Thermal Failure	96
Cosmetic Failure	97
Other Functions Failure	98
BIOS Problems	98
Intermittent Problems	99
Undetermined Problems	99
Service and Maintenance	102
Introduction	102
Recommended Equipment	102
Maintenance Flowchart	103
Getting Started	105
Battery Pack Removal	106
Battery Pack Installation	107
SD Card Removal	108
SD Card Installation	109
Base Door Removal	110
Base Door Installation	112
ODD Module Removal	114
ODD Module Installation	117
DIMM Module Removal	120
DIMM Module Installation	121
HDD Module Removal	122
HDD Module Installation	123
HDD Carrier Removal	124
HDD Carrier Installation	124
WLAN Module Removal	125
WLAN Module Installation	127
Keyboard Removal	129
Keyboard Installation	131
Upper Case Removal	133
Upper Case Installation	137
RTC Battery Removal	140
RTC Battery Installation	141
Mainboard Removal	142
Mainboard Installation	146
Fan Removal	150
Fan Installation	152
Thermal Module Removal	154
Thermal Module Installation	155
CPU Removal	157
CPU Installation	158
Speaker Removal	159
Speaker Installation	162
USB Module Removal	165
USB Module Installation	167
Power Board Removal	169
Power Board Installation	171
Touchpad FFC Removal	173
Touchpad FFC Installation	174
LCD Module Removal	175
LCD Module Installation	178
DC-In Cable Removal	182
DC-In Cable Installation	183
LCD Bezel Removal	184
LCD Bezel Installation	186
CCD Module Removal	189
CCD Module Installation	190
LCD Panel Removal	191
LCD Panel Installation	195
LCD Panel Bracket Removal	199
LCD Panel Bracket Installation	200
WLAN Antenna Removal	201
WLAN Antenna Installation	203
Microphone Module Removal	205
Microphone Module Installation	206
FRU (Field Replaceable Unit) List	208
Exploded Diagram	209
Main Assembly	209
Lower Case Assembly	211
Upper Case Assembly	212
LCD Assembly	213
FRU List	215
Screw List	222
Test Compatible Components	224
Microsoft® Windows® 7 Environment Test	224
Aspire E1-521	224
Online Support Information	233

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