IBM Aptiva Hardware Maintenance Manual page 58

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Ensure that the monitor brightness and contrast controls are not
turned down.
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Power on the system unit.
NOTE: Some monitors have a detachable system I/O signal cable between
the monitor and the system unit. In this case, check this signal cable
before replacing the unit. See "Monitor Port Signals" on page 5-28 for
pin identification.
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Ensure correct monitor refresh rate. See "Refresh Rates and
Monitor Frequencies" on page 1-14.
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Note any symptoms, messages, error codes, or beeps.
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Make sure that there are no diskette or CD in the drives.
002 - DOES SYSTEM COMPLETE POST WITH ONE SHORT BEEP AND
DOES AN IBM LOGO SCREEN APPEAR? (YES, READ AHEAD.
NO, GO TO STEP 004.)
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Insert diagnostics diskette in the diskette drive.
003 - DOES SYSTEM LOAD THE DIAGNOSTICS PROGRAM FROM THE
DISKETTE DRIVE? (YES, READ AHEAD. NO, GO TO STEP 004.)
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Follow the instructions on the screen and select Utility from the
diagnostics program menu.
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Select Tech Support Form from the menu, press F5 to execute,
then generate a system configuration report.
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Compare the system configuration list with the actual devices
installed in system.
NOTE: If necessary, remove the machine cover and visually compare the
devices installed in system to those shown in the system
configuration report.
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Go to step 006.
004 - DO ANY MESSAGES, ERROR CODES, OR SYMPTOMS APPEAR?
(YES, READ AHEAD. NO, GO TO STEP 005)
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Go to "Index of Symptoms, Messages, Error Codes, or Beeps" on
page 2-8.
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End.
005 -
Check Procedures 2-5