IBM R30 Operator's Manual page 201

Step 9
(From Steps 6, 18, 20)
The following steps analyze a console display problem.
Find your type of console display in the following table; then, follow the instructions given in
the Action column.
Console Display
Display Device
tty terminal
Step 10
(From Steps 5, 6, 12, 18)
The diagnostic control program loaded correctly.
Press the Enter key.
Is the FUNCTION SELECTION menu displayed?
NO
YES
Go to Step 11.
Go to Step 12.
Action
Go to the your display documentation for
problem determination.
Go to the documentation for problem
determination for this type of terminal.
Hardware Problem Determination
11-7