Installation

Power-On Self-Test

After you connect the DSU/CSU to a power source, the unit performs the power-on self-test to ensure that it is in good working order. The DSU/CSU performs this test on itself upon power-on or after a device reset, unless it has been disabled by the Self-Test configuration option (see Appendix C, Configuration Options).

The self-test includes a basic processor test, a limited memory test, a code checksum test, and basic verification tests of the internal components.

"Procedure

The power-on self-test consists of the following steps:

1.Once the DSU/CSU is plugged in, the Fail LED blinks ON and Off continuously.

2.All the LEDs then start to flash simultaneously in the pattern twice ON, then Off.

3.If the self-test is successful, the Fail LED turns Off and the OK LED lights.

If the self-test fails, the Fail LED lights. The DSU/CSU continues to try to operate. If you are in doubt about the results of the self-test, use the System and Test Status screen to display the results of this test (see Self-Test Results in Chapter 5, Monitoring and Testing).

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August 2000

3162-A2-GB20-40

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HP 3162 manual Power-On Self-Test, Procedure