HP 1660CP Series User Manual page 336

Troubleshooting
To run the self-tests
To exit the ROM Test, select Done. Note that the status changes to
7
PASSED or FAILED.
Install a formatted disk that is not write-protected into the flexible
8
disk drive. Connect an RS-232-C loopback connector onto the
RS-232-C port. Run the remaining System Tests in the same manner.
Select the Front Panel Test.
9
A screen duplicating the front panel appears on the screen.
Press each key on the front panel. The corresponding key on the
a
screen will change from a light to a dark color.
Test the knob by turning it in both directions.
b
Note any failures, then press the Done key a second time to exit the
c
Front Panel Test. The test screen shows the Front Panel Test status
changed to TESTED.
Select the Display Test.
10
A white grid pattern is displayed. These display screens can be used to
adjust the display.
Select Continue and the screen changes to full bright.
a
Select Continue and the screen changes to half bright.
b
Select Continue and the test screen shows the Display Test status
c
changed to TESTED.
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