HP dc7800 manual Boot Error Codes, Visual power LED Audible speaker Meaning

SYSTEM BIOS

✎Refer to Chapter 3, “Processor/Memory Subsystem” for the SPD format and DIMM data specific to this system.

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.

8.3.4Boot 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.

Table 8-1

Boot Error Codes

Visual (power LED)	Audible (speaker)	Meaning
Blinks red 2 times @ 1 Hz	None	Processor thermal shut down. Check air flow,
		fan operation, and CPU heat sink.
Blinks red 3 times @ 1 Hz	None	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	None	Bad option card.

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