For more information, see "Mouse and keyboard issues" in the HPE ProLiant Gen9 Troubleshooting
Guide, Volume I on the Hewlett Packard Enterprise website.
2. If the issue persists, replace the keyboard.
303-Keyboard controller error
Symptom
303-Keyboard controller error
Cause
• The keyboard is not connected correctly.
• The keyboard has failed.
• The mouse is not connected correctly.
• The mouse has failed.
• An issue exists with the system board.
Action
1. Verify that the keyboard and mouse are connected.
For more information, see "Mouse and keyboard issues" in the HPE ProLiant Gen9 Troubleshooting
Guide, Volume I on the Hewlett Packard Enterprise website.
CAUTION:
Only authorized technicians trained by Hewlett Packard Enterprise should attempt to remove the
system board. If you believe the system board requires replacement, contact Hewlett Packard
Enterprise technical support before proceeding. For more information, see "Accessing Hewlett
Packard Enterprise Support."
2. Run Insight Diagnostics and replace failed components as indicated.
For more information, see the maintenance and service guide on the Hewlett Packard Enterprise
website.
304-Keyboard or System Unit Error
Symptom
304-Keyboard or System Unit Error.
Cause
• The keyboard is not connected correctly.
• The keyboard has failed.
• The mouse is not connected correctly.
• The mouse has failed.
• An issue exists with the system board.
Action
303-Keyboard controller error 71