eMachines D520 eMachines D720/D520 Series Service Guide - Page 117

Common Problems, - troubleshooting

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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 108 No Display Issue Page 109 LCD Failure Page 111 Internal Keyboard Failure Page 111 TouchPad Failure Page 112 Internal Speaker Failure Page 112 Internal Microphone Failure Page 114 ODD Failure Page 116 Modem Failure Page 119 WLAN Failure Page 119 Thermal Unit Failure Page 120 Other Functions Failure Page 121 Intermittent Failures Page 122 Undermined Failures Page 122 4. If the Issue is still not resolved, see "Online Support Information" on page 161. Chapter 4 107

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Chapter 4
107
Troubleshooting
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.
4.
If the Issue is still not resolved, see “Online Support Information” on page 161.
Symptoms (Verified)
Go To
Power On Issue
Page 108
No Display Issue
Page 109
LCD Failure
Page 111
Internal Keyboard Failure
Page 111
TouchPad Failure
Page 112
Internal Speaker Failure
Page 112
Internal Microphone Failure
Page 114
ODD Failure
Page 116
Modem Failure
Page 119
WLAN Failure
Page 119
Thermal Unit Failure
Page 120
Other Functions Failure
Page 121
Intermittent Failures
Page 122
Undermined Failures
Page 122
Chapter 4