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Acer Aspire One AOD250 Acer Aspire One AOD250 Service Guide - Page 129

Troubleshooting, Common Problems

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Troubleshooting Chapter 4 Common Problems Use the following procedure as a guide for computer problems. NOTE: The diagnostic tests are intended to test only Acer products. Non-Acer products, prototype cards, or modified options can give false errors and invalid system responses. 1. Obtain the failing symptoms in as much detail as possible. 2. Verify the symptoms by attempting to re-create the failure by running the diagnostic test or by repeating the same operation. 3. Use the following table with the verified symptom to determine which page to go to. Symptoms (Verified) Go To Power On Issue Page 120 No Display Issue Page 121 LCD Failure Page 123 Internal Keyboard Failure Page 123 TouchPad Failure Page 124 Internal Speaker Failure Page 125 Internal Microphone Failure Page 127 Rightside USB Failure Page 129 Wireless Function Failure Page 130 3G Function Failure Page 131 Switch Failure Page 132 Thermal Units Failure Page 133 Power Button Failure Page 133 External Mouse Failure Page 134 Other Functions Failure Page 134 Intermittent Failures Page 135 Undermined Failures Page 135 4. If the Issue is still not resolved, see "Online Support Information" on page 207. Chapter 4 119

Section	Page
System Specifications	11
Features	11
System Block Diagram	13
Your Acer Notebook tour	14
Front View	14
Closed Front View	15
Left View	15
Right View	16
Rear and Base View	16
Indicators	17
TouchPad Basics	18
Using the Keyboard	19
Lock Keys and embedded numeric keypad	19
Windows Keys	20
Hot Keys	21
Special Keys	22
Hardware Specifications and Configurations	23
System Utilities	29
BIOS Setup Utility	29
Navigating the BIOS Utility	29
Information	30
Main	31
Security	32
Boot	35
Exit	36
BIOS Flash Utility	37
DOS Flash Utility	38
WinFlash Utility	40
Remove HDD/BIOS Password Utilities	41
Miscellaneous Utilities	43
Machine Disassembly and Replacement	47
Disassembly Requirements	47
Related Information	47
General Information	48
Pre-disassembly Instructions	48
Disassembly Process	48
External Module Disassembly Process	49
External Modules Disassembly Flowchart	49
Removing the Battery Pack	50
Removing the Lower Covers	51
Removing the Hard Disk Drive Module	53
Removing the DIMM Module	55
Removing the 3G Module	56
Main Unit Disassembly Process	58
Main Unit Disassembly Flowchart	58
Removing the Keyboard	59
Removing the Upper Cover	61
Removing the Power Board	65
Removing the Bluetooth Module	67
Removing the TouchPad FFC	68
Removing the WLAN Board	69
Removing the USB Board	71
Removing the Mainboard	73
Removing the RTC Battery	76
Removing the Thermal Module	77
Removing the Speaker Module	79
Removing the LCD Module	81
Removing the AC Power Jack	84
LCD Module Disassembly Process	85
LCD Module Disassembly Flowchart	85
Removing the LCD Bezel	86
Removing the Camera Board	88
Removing the LCD Panel	89
Removing the LCD Brackets and FPC Cable	91
Removing the Antennas	93
LCD Module Reassembly Procedure	96
Replacing the Antennas	96
Replacing the LCD Cable and Brackets	99
Replacing the LCD Panel	102
Replacing the Camera Board	103
Replacing the LCD Bezel	105
Main Module Reassembly Procedure	106
Replacing the AC Power Jack	106
Replacing the LCD Module	107
Replacing the Speaker Module	110
Replacing the Thermal Module	111
Replacing the Mainboard	112
Replacing the USB Board	114
Replacing the WLAN Board	115
Replacing the TouchPad FFC	116
Replacing the Bluetooth Module	116
Replacing the Power Board	118
Replacing the Upper Cover	120
Replacing the Keyboard	123
Replacing the 3G Module	123
Replacing the DIMM Module	125
Replacing the Hard Disk Drive Module	125
Replacing the Lower Covers	127
Replacing the Battery Pack	128
Troubleshooting	129
Common Problems	129
Power On Issue	130
No Display Issue	131
Random Loss of BIOS Settings	132
LCD Failure	133
Built-In Keyboard Failure	133
TouchPad Failure	134
Internal Speaker Failure	135
Internal Microphone Failure	137
HDD Not Operating Correctly	138
USB Failure (Rightside)	139
Wireless Function Test Failure	140
3G Function Test Failure	141
Switch Failure	142
Thermal Units Failure	143
Power Button Failure	143
External Mouse Failure	144
Other Failures	144
Intermittent Problems	145
Undetermined Problems	145
Motherboard CMOS Discharge	146
POST Code Reference Tables	147
Sec:	147
Memory:	147
BDS & Specific action:	148
Each PEIM entry point used in 80_PORT	149
Each Driver entry point used in 80_PORT	149
Each SmmDriver entry point used in 80_PORT	152
Jumper and Connector Locations	153
Top View	153
Bottom View	154
Power board	155
Card reader board	156
Clearing Password Check and BIOS Recovery	157
Clearing Password Check	157
BIOS Recovery by Crisis Disk	158
FRU (Field Replaceable Unit) List	159
Aspire one Exploded Diagrams	160
Main Assembly	160
Rear Assembly	161
Upper Cover Assembly	162
Lower Cover Assembly	163
LCD Assembly	164
Aspire one FRU List	165
Screw List	173
Model Definition and Configuration	174
Aspire one Series	174
Test Compatible Components	209
Windows XP Environment Test	210
Online Support Information	217

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