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3-10 Diagnostic Tools
POST Error Messages
continued
Error Code
Audible
Beeps
L=Long
S=Short
Probable Source of
Problem
Action
301-Keyboard
Error
None Keyboard failure. Turn off the computer, then
reconnect the keyboard.
301-Keyboard
Error or Test
Fixture Installed
None Keyboard failure. Replace the keyboard.
ZZ
-301-Keyboard
Error
None Keyboard failure. (
ZZ
represents the Keyboard
Scan Code.)
1. A key is stuck. Try to free it.
2. Replace the keyboard.
303-Keyboard
Controller Error
None System board, keyboard,
or mouse controller
failure.
1. Run Diagnostics.
2. Replace failed assembly as
indicated.
304-Keyboard or
System Unit Error
None Keyboard, keyboard
cable, or system board
failure.
1. Make sure the keyboard is
attached.
2. Run Diagnostics to
determine which is in error.
3. Replace the part indicated.
40X-Parallel Port
X Address
Assignment
Conflict
2S Both external and internal
ports are assigned to
parallel port X.
Run the System Configuration
Utility
and correct.
402-Monochrome
Adapter Failure
1L, 2S Monochrome display
controller.
Replace the monochrome
display controller.
501-Display
Adapter Failure
1L, 2S Video display controller. Replace the video board.
601-Diskette
Controller Error
None Diskette controller circuitry
failure.
1. Make sure the diskette drive
cables are attached.
2. Replace the diskette drive
and/or cable.
3. Replace the system board.
605-Diskette
Drive
Type Error
2S Mismatch in drive type. Run the System Configuration
Utility to set diskette type
correctly.