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A-4 www.hp.com Technical Reference Guide
Error Messages and Codes
1801-Microcode Patch Error A processor is installed for which the BIOS ROM has no patch.
Check for ROM update.
Invalid Electronic Serial
Number
Electronic serial number has become corrupted.
Network Server Mode Active
and No Keyboard Attached
Keyboard failure while Network Server Mode enabled.
Parity Check 2 Keyboard failure while Network Server Mode enabled.
Table A-2. (Continued)
Power-On Self Test (POST) Messages
Error Message Probable Cause