HP Pro 3420 Maintenance & Service Manual page 128

Table B-1 Numeric Codes and Text Messages (continued)
Control panel message
Network Server Mode Active and No
Keyboard Attached
Parity Check 2
120 Appendix B POST Error Messages
Description
Keyboard failure while Network Server
Mode enabled.
Parity RAM failure or a PCI/PCIe device is
asserting a SERR#.
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.
Run Computer Setup and Diagnostic
utilities. To disable a PCI/PCIe device from
asserting a SERR#, run the Computer
Setup utility and select Advanced > Bus
Options > SERR# Generation > Disable.