IBM 6C4 - Manual (Page 177)

Step 7
This step loads online diagnostics in service mode. If you are unable to load the
diagnostics, go to “Step 8”.
1. Turn on the power.
2. When the keyboard indicator appears, press 6 on the directly attached keyboard, or
6 on the ASCII terminal keyboard, to indicate that diagnostics should be loaded.
3. Enter any requested passwords.
4. Follow any instructions to select a console.
Did the Diagnostics Operating Instructions display without any obvious display
problem?
NO Go to “Step 8”.
YES Go to “Step 10” on page 160.
Step 8
Starting at the top of the following table, find your symptom and follow the instructions
given in the Action column.
Symptom Action
Display problem Go to “Step 9”.
All other symptoms Go to “Problem Determination When Unable to
Load Diagnostics” on page 164
Step 9
Find your type of console display in the following table. Then follow the instructions
given in the Action column.
Console Display Action
Display Device Go to the display documentation for problem
determination.
ASCII terminal Go to the problem-determination documentation
for this type of terminal.
Chapter 8. Hardware Problem Determination 159