Boot Error Codes - HP Compaq dc7900 USDT Technical Reference Manual

SYSTEM BIOS
The BIOS performs memory detection and configuration with the following steps:
1. Program the buffer strength control registers based on SPD data and the DIMM slots that are
populated.
2. Determine the common CAS latency that can be supported by the DIMMs.
3. Determine the memory size for each DIMM and program the GMCH accordingly.
4. Enable refresh.

8.3.4 Boot Error Codes

The BIOS provides visual and audible indications of a failed system boot by using the system's
power LED and the system board speaker. The error conditions are listed in the following table.
Visual (power LED)
Blinks red 2 times @ 1 Hz
Blinks red 3 times @ 1 Hz
nks red 4 times @ 1 Hz
Bli
Blinks red 5 times @ 1 Hz
Blinks red 6 times @ 1 Hz
Blinks red 7 times @ 1 Hz
Blinks red 8 times @ 1 Hz
Blinks red 9 times @ 1 Hz
Blinks red 10 times @ 1 Hz
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.
8-4
Table 8-1
Boot Error Codes
Audible (speaker) Meaning
2 beeps Processor thermal shut down. Check air flow, fan
operation, and CPU heat sink.
3 beeps Processor not installed. Install or reseat CPU.
None Power failure (power supply is overloaded). Check
storage devices, expansion cards and/or system
board (CPU power connector P3).
5 beeps Pre-video memory error. Incompatible or
incorrectly seated DIMM.
6 beeps Pre-video graphics error. On system with
integrated graphics, check/replace system board.
On system with graphics card, check/replace
graphics card.
7 beeps PCA failure. Check/replace system board.
8 beeps Invalid ROM (checksum error). Reflash ROM using
CD or replace system board.
9 beeps System powers on but fails to boot. Check power
supply, CPU, system board.
10 beeps Bad option card.
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