Keyboard
+---+
|001|- START
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° Power off system unit and ensure the keyboard plug is connected properly.
+---+
|002|
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° Insert the diagnostics diskette into the diskette drive and power on the system unit.
° Select Interactive Tests menu, then execute Keyboard test.
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|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.
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|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.
Please see the LEGAL - Trademark notice.
Feel free - send a 
for any BUG on this page found - Thank you.