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Acer Aspire E1-421 Acer Aspire E1-421 Notebook Service Guide - Page 178

Other Functions Failure, Change mainboard to check if current one is defective.

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Other Functions Failure 0 1. Check if drives are functioning correctly. 2. Check if external modules are functioning correctly. 3. Change mainboard to check if current one is defective. 4-14 Troubleshooting

Section	Page
Hardware Specifications	11
Features	15
Operating System	15
Platform	15
System Memory	15
Display	15
Audio	15
Graphics	16
Storage	16
Optical Media Drive	16
Webcam	16
Wireless and Networking	17
Privacy Control	17
Dimension and Weight	17
Power Adapter and Battery	17
Input and Control	18
Input and Output (I/O) Ports	18
Software	18
Optional Items	19
Warranty	19
Environment	20
Notebook Tour	21
Touchpad Basics	27
Using the Keyboard	28
Windows Keys	29
Hotkeys	30
System Block Diagram	32
Specification Tables	33
Computer specifications	33
System Board Major Chips	34
Processor	34
Processor Specifications	34
CPU Fan True Value Table	35
System Memory	35
Memory Combinations	35
Video Interface	36
BIOS	36
Keyboard	36
Battery	37
AC Adapter	37
Hard Disk Drive (AVL components)	38
Hard Disk Drive (AVL components) (Continued)	39
DVD Super-Multi Drive	40
DVD Super-Multi Drive (Continued)	41
LCD 14.0”	42
LCD 14.0” (Continued)	43
LCD 14.0” (Continued)	44
LCD Inverter (not available with this model)	44
Display Supported Resolution (LCD Supported Resolution)	45
Graphics Controller	45
Display Supported Resolution (GPU Supported Resolution)	45
LAN Interface	46
Bluetooth Interface (not available in this model)	46
Bluetooth Module (not abailable in this model)	46
Wireless Module 802.11 b/g/n	46
Mini Card Wireless Networking Card	47
3G Card (not available in this model)	47
Audio Interface	47
Audio Codec and Amplifier	48
1.3M HD Camera	49
1.0M HD Camera	49
0.3M Camera	49
VRAM (not available in this model)	49
USB Port	50
HDMI Port	50
System Power Management	50
Card Reader	51
System LED Indicator	51
System DMA Specification	52
System Interrupt Specification	53
System I/O Address Map	57
System Utilities	59
BIOS Setup Utility	61
Navigating the BIOS Utility	61
BIOS	62
Information	62
Main	64
Security	66
Boot	70
Exit	71
BIOS Flash Utilities	72
DOS Flash Utility	73
WinFlash Utility	75
Clearing BIOS Passwords	76
Removing Insyde BIOS Passwords	77
Removing Insyde HDD Password	79
Miscellaneous Tools	80
Using DMITools	80
Using UUIDTools	84
Using the LAN MAC EEPROM Utility	85
Crisis Disk Recovery	86
Machine Maintenance Procedures	87
Introduction	91
General Information	91
Recommended Equipment	91
Pre-disassembly Instructions	92
Disassembly Process	93
External Module Disassembly Process	94
External Modules Disassembly Flowchart	94
Dummy Card Removal	95
Battery Pack Removal	96
ODD (Optical Disk Drive) Module Removal	97
Keyboard Removal	99
Base Door Removal	100
WLAN (Wireless Local Area Network) Module Removal	101
DIMM (Dual In-line Memory Module) Module Removal	103
HDD (Hard Disk Drive) Module Removal	104
Main Unit Disassembly Process	106
Main Unit Disassembly Flowchart	106
Upper Case Removal	107
IO Board Removal	109
Mainboard Removal	111
Speaker Module Removal	114
RTC battery Removal	116
Thermal Module Removal	118
LCD (Liquid Crystal Display) Module Removal	119
DC-in Jack Removal	121
Support Bracket Removal	122
LCD Module Disassembly Process	123
LCD Module Disassembly Flowchart	123
LCD Bezel Removal	124
Camera Module Removal	127
LCD Panel Removal	128
LCD Bracket Removal	129
LVDS and Camera Cable Removal	130
LCD Reassembly Process	132
Replacing the LVDS and Camera Cable	132
Replacing the LCD Bracket	134
Replacing the LCD Panel	135
Replacing the Camera Module	136
Replacing the LCD Bezel	137
Main Unit Reassembly Process	139
Replacing the Support Bracket	139
Replacing the DC-in Jack	140
Replacing the LCD (Liquid Crystal Display) Module	141
Replacing the Thermal Module	143
Replacing the RTC battery	145
Replacing the Speaker Module	146
Replacing the Mainboard	147
Replacing the IO Board	149
Replacing the Upper Case	151
External Module Reassembly Process	153
Replacing the HDD (Hard Disk Drive) Module	153
Replacing the DIMM (Dual In-line Memory Module) Module	155
Replacing the WLAN (Wireless Local Area Network) Module	156
Replacing the Base Door	157
Replacing the Keyboard	158
Replacing the ODD (Optical Disk Drive) Module	160
Replacing the Battery Pack	162
Replacing the Dummy Card	163
Troubleshooting	165
Introduction	167
General Information	167
Power On Issues	168
No Display Issues	169
LCD Picture Failure	171
Internal Keyboard Failure	172
Touchpad Failure	173
Internal Speaker Failure	174
Internal Microphone Failure	176
USB Failure	177
Other Functions Failure	178
Intermittent Problems	179
Undetermined Problems	179
Post Codes	180
Jumper and Connector Locations	189
Mainboard Jumper and Connector Locations	191
Clearing Password Check and BIOS Recovery	193
Clearing Password Check	193
BIOS Recovery by Crisis Disk	195
FRU (Field Replaceable Unit) List	197
Exploded Diagrams	200
FRU List	204
Screw List	213
Model Definition and Configuration	215
Acer Aspire E1-421	217
Test Compatible Components	241
Microsoft® Windows® 7 Environment Test	244
Online Support Information	251

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