IBM Aptiva 2158 Hardware Maintenance Service page 96

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Select Interactive Tests from the Main Menu.
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Select and execute Video test from the menu.
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Follow the prompts and perform the video test.
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Go to"Index of Symptoms, Messages, Error Codes, or Beeps" on page 33.
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You might have to adjust the monitor controls to obtain the best image.
003 - DOES THE MONITOR SUCCESSFULLY PASS ALL TESTS? (YES,
READ AHEAD. NO, GO TO STEP 004)
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You have successfully completed the video diagnostics tests. If the problem
remains, go to "Index of Symptoms, Messages, Error Codes, or Beeps" on
page 33
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End.
004 -
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Power off the system unit.
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Remove the hard disk drive system cable.
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Power on the system unit.
005 - IS THE SCREEN READABLE?
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Replace the monitor. If the symptom remains, replace the system board.
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End.
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