HP ProLiant ML370 Generation 4 Reference And Troubleshooting Manual page 247

3. If the failure reoccurs, replace the keyboard.
303-Keyboard Controller Error
Audible Beeps: None
Possible Cause: System board, keyboard, or mouse controller failure occurred.
Action:
1. Be sure the keyboard and mouse are connected.
2. Run Insight Diagnostics ("HP Insight Diagnostics" on page 126) and replace
failed components as indicated.
304-Keyboard or System Unit Error
Audible Beeps: None
Possible Cause: Keyboard, keyboard cable, mouse controller, or system board
failure.
Action:
1. Be sure the keyboard and mouse are connected.
2. Run Insight Diagnostics ("HP Insight Diagnostics" on page 126) and replace
failed components as indicated.
400 Series
List of messages:
40X-Parallel Port X Address Assignment Conflict
CAUTION: Only authorized technicians trained by HP should
attempt to remove the system board. If you believe the system board
requires replacement, contact HP Technical Support before proceeding.
CAUTION: Only authorized technicians trained by HP should
attempt to remove the system board. If you believe the system board
requires replacement, contact HP Technical Support before proceeding.
Troubleshooting
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