66     IBM Desktop System HMM
Keyboard
001 - START
•
Power off system unit and ensure the keyboard 
plug is connected properly. 
002 -
•
Insert the diagnostics diskette into the diskette 
drive and power on the system unit.
•
Select Interactive Tests menu, then execute 
Keyboard test.
003 - DOES THE KEYBOARD FUNCTION 
CORRECTLY? (YES, READ AHEAD. NO, GO TO 
STEP 004.)
•
Keyboard is functioning normally.
•
End.
004 - ARE THERE ANY STUCK KEYS OR ANY 
GRIME IN THE GAP OF KEYCAPS? (YES, READ 
AHEAD. NO, GO TO STEP 005.)
•
Power off the system unit. Carefully remove the 
grime and solve the stuck keys problem. 
•
Go to step 001.
005 - ARE THERE ANY BROKEN PINS IN THE 
KEYBOARD PLUG? (YES, GO TO STEP 007. NO, 
READ AHEAD.)
•
Try with a known good keyboard.
006 -  DOES THE ERROR SYMPTOM STILL 
REMAIN? (YES, READ AHEAD. NO, GO TO STEP 
007.)
•
Replace the system board.
•
End.
007 - 
•
Replace the keyboard.
•
End.