IBM RT PC 10 Hardware Maintenance And Service page 67

Problem Determination Procedure
Use this procedure to obtain a Service Request Number (SRN).
This procedure uses the IBM RT PC Diagnostic Diskettes and the advanced
diagnostic routines to diagnose hardware problems only.
Step 1
Check the system for the following problems:
• Broken covers
• Loose cables
• Power supply cooling fan not operating
• Air flow restricted (air vents in the covers)
• Segments of the Two-Digit Display not working (tested at the first of
the power-on self-test)
• Keyboard indicators or speaker not working (tested during power-on
self-test)
• A damaged field-replaceable unit (FRU).
DID YOU FIND ONE OF THE ABOVE PROBLEMS?
YES Repair or exchange the FRU, then run the System Checkout.
Notes:
1. If the keyboard indicators or speaker is failing, replace the
keyboard.
2. If the Two-Digit Display is failing, replace the Operator Panel
Board.
NO Continue on the next page.
3-22 Service Manual