IBM 3270 Hardware User's Manual page 125

Did you just add an option to your system unit?
No Yes
I
Make sure that you installed the option
correctly.
If you find that you did not install the
option correctly, correct the problem.
Rerun the POST.
If the POST does not run correctly,
remove the option, and rerun the POST
again. If the POST still does not run
correctly, your system unit has a
problem. Report the problem or have
the unit serviced to fix the problem . •
If the POST runs correctly, the
option has a problem. Report
the problem or have the option
serviced to fix the problem . •
1.
Be sure that you made a note of your screen
and audio responses.
If you missed the responses, rerun the POST.
2. Go to the POST Error Chart on page 5-11.
5-10 Book 1 - 3270 PC Work Station User's Guide