Acer Extensa 7620, Service Manual

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Chapter 4 105
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 failure. (The power indicator does
not go on or stay on.) “Power System Check” on page 107.
POST does not complete. No beep or error
codes are indicated. “Power-On Self-Test (POST) Error
Message” on page 110
“Undetermined Problems” on page 124
POST detects an error and displayed
messages on screen. “Error Message List” on page 111
Other symptoms (i.e. LCD display problems
or others). “Power-On Self-Test (POST) Error
Message” on page 110
Symptoms cannot be re-created
(intermittent problems). Use the customer-reported symptoms and
go to “Power-On Self-Test (POST) Error
Message” on page 110
“Intermittent Problems” on page 123
“Undetermined Problems” on page 124
Troubleshooting
Chapter 4
SG_Tangiz.book Page 105 Tuesday, July 10, 2007 11:01 AM