Note if errors are encountered with the reference disk in the drive they will be identified.
See Appendix D for full listing.
This is usually a case of non-IBM components added to the system.
Some examples are video adapters, hard drive controllers, and the like.
In most cases, POST is always right and the reference disk is tricked into
thinking there is a problem so don't have a heart attack when it gives
you the: 'Replace system board' message it could just be a normal option
generated error. Also lock-ups are common with some video cards added
to the system.
The *EASY* method if your system hangs on the full tests is to enter <CTRL>-A from the reference disk main menu and select the test it hung up on. If everything checks out then no problem.
If you want it to run the full test without hanging the only method
is to remove each card and reboot with the reference disk allow it to auto-configure
and then reboot and run the reference disk tests. If the system hangs
now then there is a problem with the system not related to added options,
contact IBM or a repair tech promptly and try not to use the machine until
Anyone know of a good repair facility??? They are all currently closed.
In order to perform a total test of the ports (when running IBM diagnostics) you need to provide the incoming signals to the port via a wrap plug.
The constructions for each (serial and parallel) wrap plug can be found HERE.