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66 Chapter 4
System Check Procedures
External Diskette Drive Check
Use the following procedure to isolate a problem in diskette drive controller, driver, or diskette. A write-enabled,
diagnostic diskette is required.
NOTE: Make sure that the diskette does not have more than one label attached to it. Multiple labels can cause
damage to the drive or cause the drive to fail.
1. Boot from the diagnostics diskette and start the diagnostics program.
2. See if FDD Test is passed as the program runs to FDD Test.
3. Follow the onscreen instructions.
If an error occurs with the internal diskette drive, reconnect the diskette connector on the mainboard. If the
error persists, do the following:
1. Reconnect the external diskette drive.
2. Replace the external diskette drive.
3. Replace the mainboard.
External Optical Drive Check
Use the following procedure to isolate a possible problem in an optical drive controller, drive, or optical drive.
NOTE: Make sure that the optical drive does not have any label attached to it. The label may damage the drive
or cause drive failure.
1. Boot from the diagnostics diskette and start the diagnostics program.
2. Run the CD-ROM Test and see if the test completes successfully.
3. Follow the onscreen instructions.
If an error occurs, reconnect the drive connector on the mainboard.
If the error still remains:
1. Reconnect the external optical drive to a USB jack.
2. Replace the external optical drive.
3. Replace the mainboard.
Keyboard or Auxiliary Input Device Check
If the internal keyboard does not work or an unexpected character appears, make sure that the flexible cable
extending from the keyboard is correctly seated in the connector on the mainboard. If the keyboard cable is
connected correctly, run the Keyboard Test.
IMPORTANT:Disconnect any external keyboards before testing the built-in or internal keyboard.
If the tests detect a keyboard problem, do the following in sequence:
1. Reconnect the keyboard cable to the mainboard.
2. Replace the keyboard.
3. Replace the mainboard.
IMPORTANT:Do not replace a non-defective FRU.
The following auxiliary input devices are supported by this system:
• Numeric keypad
• External keyboard
If any of these devices do not function, reconnect the cable and repeat above procedures.