Diagnostics and Troubleshooting 3-11
Table 3-2
POST Error Messages
continued
Error Code Audible Beeps Probable Source of Problem Recommended Action
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.
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.
1151 - Com Port 1
Address Assignment
Conflict
2S Both external and internal serial
ports are assigned to COM1.
Run the System Configuration
Utility and correct.
1152 - Com
Port 2, 3,
or 4 Address
Assignment Conflict
2S Both external and internal serial
ports are assigned to COM2,
COM3 or COM4.
Run the System Configuration
Utility and correct.
1610 - Temperature
violation detected.
Waiting for system to
cool
2S Ambient system temperature too
hot
Check fan in system
environment.
1611 - Fan failure
detected
2S Required fan not installed or
spinning
Check fans.
continued
