IBM AT/370 Manual To Operations page 79

24
Set system unit Power switch to
Off.
B~
1 1 ~ 1 , ~ m 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
System Unit
Power Switch
25
Set all external Power switches to Off (printer,
display, etc.).
26
Diagnostic testing of the AT/370 adapter is
complete. If no error is found but the system
fails to work properly, go to "Further Diagnostic
Testing Required" on page 4-24.
Problem Determination Procedures 4-23