2-26 420 Series
2.9 CD-ROM Drive Troubleshooting
This section describes how to determine if the 420 series internal CD-ROM drive is function-
ing properly. Perform the steps below starting with Procedure 1 and continuing with the
other procedures as required.
Procedure 1: CD Cleaning Check
Procedure 2: Diagnostic Test Program Execution Check
Procedure 3: Connector Check and Replacement Check
Procedure 1 CD Cleaning Check
Clean the laser pickup lens with a lens cleaner. Apply the cleaner to a cloth and wipe the lens.
If the CD-ROM drive still does not function properly after cleaning, go to Procedure 2.
Procedure 2 Diagnostic Test Program Execution Check
The CD-ROM drive Diagnostic Test program is stored on the 420 series Diagnostics Disk.
After Toshiba MS-DOS loads, run the diagnostic program stored on the test program dis-
kette. Insert a test CD (Toshiba-EMI Test Disc TDY-03) into the CD-ROM drive and run
the test. Refer to Chapter 3, Tests and Diagnostics, for more information about the diagnos-
tics test procedures.
If any other errors occur while executing the CD-ROM drive diagnostics test, go to Proce-
dure 3.
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