94 Chapter 4System Check ProceduresExternal CD/DVD-ROM Drive CheckPerform the following procedures to isolate the possible problem a controller, drive, or CD-ROM.NOTE: Make sure that the CD-ROM does not have any label attached to it. The label may damage the drive orcause drive failure.1. Boot from the diagnostic disc and start the diagnostic programs.2. See if CD-ROM Test is passed when the program runs the CD-ROM Test.3. Follow onscreen instructions.If an error occurs, reconnect the drive to the connector on the mainboard. If the error persists, do the following:1. Reconnect the CD/DVD-ROM drive.2. Replace the CD/DVD-ROM drive.3. Replace the mainboard.Keyboard or Auxiliary Input Device CheckRemove the external keyboard if the internal keyboard is to be tested.If the internal keyboard does not work or an unexpected error occurs, make sure that the flexible cableextending from the internal keyboard is correctly connected to the mainboard. If the keyboard cableconnection is correct, run the Keyboard Test.If the tests detect a keyboard problem, do the following procedures in sequence to correct the problems. Donot replace a non-defective FRU:1. Reconnect the keyboard cable.2. Replace the keyboard.3. Replace the mainboard.The following auxiliary input devices are supported by this computer: Numeric keypad External keyboardIf any of these devices do not function, reconnect the cable and repeat above procedures.Memory CheckNOTE: Make sure that the DIMM is properly installed into the connector. A loose connection can cause anerror.Do the following:1. Boot from the diagnostic diskette and start the diagnostic program.2. Go to the diagnostic memory in the test items.3. Press F2 in the test items.4. Follow onscreen instructions.
