HP Compaq d330 DT Troubleshooting Manual page 62

Numeric Codes and Text Messages (Continued)
Code/Message
301-Keyboard Error
303-Keyboard
Controller Error
304-Keyboard or
System Unit Error
401-Parallel Port 1
Address Assignment
Conflict
402-Parallel
Port 2 Address
Assignment Conflict
403-Parallel Port 3
Address Conflict
Detected
404-Parallel Port
Address Conflict
Detected
Troubleshooting Guide
Probable Cause
Keyboard failure.
I/O board keyboard
controller.
Keyboard failure.
IRQ address conflicts
with another device.
IRQ address conflicts
with another device.
IRQ address conflicts
with another device.
Both external and
internal ports are
assigned to
parallel port X.
www.hp.com
Recommended Action
1. Reconnect keyboard with computer
turned off.
2. Check connector for bent or missing
pins.
3. Ensure that none of the keys are
depressed.
4. Replace keyboard.
1. Reconnect keyboard with computer
turned off.
2. Replace the system board.
1. Reconnect the keyboard with
computer turned off.
2. Ensure that none of the keys are
depressed.
3. Replace the keyboard.
4. Replace the system board.
Reset the IRQ.
Reset the IRQ.
Reset the IRQ.
1. Remove any parallel port expansion
cards.
2. Clear CMOS. (See
"Password Security and Resetting
CMOS.")
3. Reconfigure card resources and/or
run Computer Setup.
POST Error Messages
Appendix B,
A–5