IBM AT/370 Manual To Operations page 76

20
Did the following appear on your screen?
Option X: Run Tests Y Time(s).
TEST COMPLETE:
Press <Enter> to return to
Diagnostic Options screen.
NO ERROR FOUND
Press <Ctrl>-<Break> at any time to stop the
tests and return to the Diagnostic Options screen.
YES- Proceed with step 21 on page 4-21.
NO - Have your system unit serviced.
4-20 Problem Determination Procedures