Technical data

4-20 Fault Isolation

Procedure 4-3. Running the Continuous Self Test Diagnostics

1. Log out and stop any user processes.

2. Shut down to the MD prompt by typing the following at the “login:” prompt:

3. At the MD prompt “ > “, type the following:

> re < RETURN >

4. After the beeper sounds, press < RETURN > and type the following:

> ct < RETURN >

end of procedure

Self Test Diagnostic Error Messages

If an error occurs, the Self lest diagnostics use the LEDs and the display screen to dis

play a message or code that calls out the failing FRU.

If the system is in NORMAL mode and an error occurs, you receive a prompt asking if

you wish to continue the tests and try to boot the operating system. The LEDs and the

display screen show the failing FRU and system status.

If the system is in SERVICE mode and an error occurs, the tests halt, with the LEDs

and the display screen showing the failing FRU and system status.

Figure 4-11 shows the LEDs on the front panel that call out the failing FRU during the

CPU/CPU board/Memory testing. The Power LED is always on when the system is

powered on. The SERVICE mode LED is on only when SERVICE mode is enabled.