HP 1660 Series Service Manual page 160

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.
Select Run, then select Single.
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To run a test continuously, select Repetitive. Select Stop to halt a repetitive test.
For a Single run, the test runs one time, and the screen shows the results.
Troubleshooting
To run the self-tests
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