Technical Reference Guide www.hp.com A-1
A
Error Messages and Codes
A.1 Introduction
This appendix lists the error codes and a brief description of the probable cause of the error.
✎
Errors listed in this appendix are applicable only for systems running HP/Compaq BIOS.
Not all errors listed in this appendix may be applicable to a particular system model and/or
configuration.
A.2 Beep/Power LED Codes
✎
Beep and Power LED indictions listed in Table A-1 apply only to HP-branded models.
NOTE: Audible indications occur only for the five cycles of the error indication. Visual indications
occur indefinitely until power is removed or until error is corrected.
Table A-1.
Beep/Power LED Codes
Beeps Power LED Probable Cause
2 beeps Blinks red 2 times @ 1 Hz Processor thermal shut down. Check air flow, fan operation,
and CPU heatsink
3 beeps Blinks red 3 times @ 1 Hz Processor not installed. Install or reseat CPU.
4 beeps Blinks red 4 times @ 1 Hz Power failure (power supply is overloaded). Check storage
devices, expansion cards and/or system board (CPU power
connector P3).
5 beeps Blinks red 5 times @ 1 Hz Pre-video memory error. Incompatible or incorrectly seated
DIMM.
6 beeps Blinks red 6 times @ 1 Hz Pre-video graphics error. On system with integrated graphics,
check/replace system board. On system with graphics card,
check/replace graphics card.
7 beeps Blinks red 7 times @ 1 Hz PCA failure. Check/replace system board.
8 beeps Blinks red 8 times @ 1 Hz Invalid ROM (checksum error). Reflash ROM using CD or
replace system board.
9 beeps Blinks red 9 times @ 1 Hz System powers on but fails to boot. Check power supply, CPU,
system board.
10 beeps Blinks red 10 times @ 1 Hz Bad option card.
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