IBM RT PC 10 Hardware Maintenance And Service page 88

Step 20
Look at the display attached to your system. If needed, see Section 11.
Display Type Model Go to Step
IBM Personal Computer Display 5151 "Step 21" on page 3-44
Enhanced Color Display 5154 "Step 25" on page 3-48
Advanced Monochrome
6153 "Step 31" on page 3-54
Graphics Display
IS THE DISPLAY ATTACHED TO YOUR SYSTEM LISTED IN THE
TABLE?
YES Go to the step for your display.
NO Go to the service documentation for the attached display.
Problem Isolation Charts 3-43