HP 1660CS-Series User Manual page 327

Troubleshooting
To run the self-tests
Press the System key, then select the field next to Sys PV. Select
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System Test to access the system tests.
Select ROM Test. The ROM Test screen is displayed.
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You can run all tests at one time by running All System Tests. To see more
details about each test, you can run each test individually. This example
shows how to run an individual test.
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