IBM RT PC Problem Determination Manual page 75

S t e p 73. D i s k e t t e
Check that the diagnostic diskette is inserted correctly in the
diskette drive.
IS TH E D IS K E T T E IN S E R T E D C O RR EC TLY ?
CONTINUE to next page.
YES
Go to "Step 3. Loading Diagnostics" on page 2-11, and
NO
try the procedures again.
Section 2. Hardware Problems
2-47