IBM RT PC Problem Determination Manual page 77

Step 80. Blinking Two-Digit Display
1. Look at the two-digit display.
2. Compare the blinking number in the two-digit display with the
numbers in the table below.
Two-Digit Go to Step
Display
Number
Go to "Step 81. Blinking
02
Two-Digit Display" on
page 2-50.
Go to "Step 81. Blinking
30
Two-Digit Display" on
page 2-50.
Go to "Step 82. Blinking
99
Two-Digit Display" on
page 2-51.
IS THE BLINKING NUMBER LISTED IN THE TABLE?
YES Go to the step indicated in the table.
NO Report Service Request Number (SRN) 16-986.
Have the system unit serviced.
Section 2. Hardware Problems 2-49