IBM Personal Computer AT Manual To Operations page 309

5
If you have a 432 error do one of the following:
• If you do not have a printer attached, have
your system unit serviced. Be sure your Key
Lock key is with your system unit.
• If you have an
IBM
Graphics Printer
attached to your system unit, go to "Test
8000" in this section.
• If you have an
IBM
Color Printer attached to
your system unit, go to "Test 8020" in this
section.
Test 400-5