HP 400 Series Servicing Manual page 72

offline Test Stimulus Code (TSC). If the TSC or SAX diagnostics fail, replace the indi-
cated FRU. If the system does not report errors, the suspected problem is probably not
hardware related. Refer to the following sections for more information about Self Test,
TSC, and SAX.
Troubleshooting in HP-UX Compatible Mode
You must be familiar with the HP-UX operating system to troubleshoot Series 400 sys-
tem units that are running in HP-UX Compatible mode with HP-UX. You must be
able to start and stop processes. You should also be familiar with the Boot ROM Test
Mode, Series 300 Test Tools and the HP-UX ce.utilities. The Series 200/300 Test Tools
Manual has instructions for running the Series 300 Test Tools. Instructions for using
ce.utilities are found in the System Support Tape User's Guide.
For Series 400 systems that run HP-UX Compatible mode, you note any error or status
messages, and then run the power-up boot ROM diagnostics, known as Self Test. If the
Self Test diagnostics fail, replace the FRU that is indicated. If the tests pass but you
still suspect a problem, run the TSC diagnostics. Refer to the following sections for
more information about Self Test and TSC.
4-2 Fault Isolation