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Technical Reference Guide www.hp.com 8-5
System BIOS
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 8-1
Boot Error Codes
Visual (power LED) Audible (speaker) Meaning
Blinks red 2 times @ 1 Hz 2 beeps Processor thermal shut down. Check air flow, fan
operation, and CPU heat sink.
Blinks red 3 times @ 1 Hz 3 beeps Processor not installed. Install or reseat CPU.
Blinks red 4 times @ 1 Hz None Power failure (power supply is overloaded). Check
storage devices, expansion cards and/or system
board (CPU power connector P3).
Blinks red 5 times @ 1 Hz 5 beeps Pre-video memory error. Incompatible or
incorrectly seated DIMM.
Blinks red 6 times @ 1 Hz 6 beeps Pre-video graphics error. On system with
integrated graphics, check/replace system board.
On system with graphics card, check/replace
graphics card.
Blinks red 7 times @ 1 Hz 7 beeps PCA failure. Check/replace system board.
Blinks red 8 times @ 1 Hz 8 beeps Invalid ROM (checksum error). Reflash ROM using
CD or replace system board.
Blinks red 9 times @ 1 Hz 9 beeps System powers on but fails to boot. Check power
supply, CPU, system board.
Blinks red 10 times @ 1 Hz 10 beeps Bad option card.
Blinks red 10 times @ 1 Hz 11 beeps Feature previously enabled is not supported by
processor