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
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 | |
|
| incorrectly seated DIMM. |
|
|
|
Blinks red 6 times @ 1 Hz | 6 beeps | |
|
| 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. |
|
|
|
| www.hp.com | Technical Reference Guide |
