Toshiba T2000 Maintenance Manual page 49

If only the contrast does not change, refer to Procedure 3.
If both the brightness and contrast do not change, refer to Procedure 2.
Procedure 2
Test Program Check
The display test program is stored on the T2000 Diagnostics Disk. This program checks the dis-
play controller on the system board. After loading Toshiba MS-DOS, run the Diagnostic Program
(TESTCE2). Refer to Part 3 for detailed instructions about the display test.
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