Compaq D310 manual HP e-DiagTools Preboot Diagnostics Beep Codes, Meaning

BIOS Overview

HP e-DiagTools Preboot Diagnostics (Beep Codes)

When your PC starts up, its BIOS performs a Power-on Self Test (POST) to test your hardware configuration for any problems. If a problem is detected during the POST, an error is displayed on your PC’s monitor.

If, however, your PC is unable to display an error message (for example, when your graphics controller has failed), it will emit a buzzing sound. This is the e-DiagTools preboot diagnostic. In the event of a problem with your PC immediately after the buzzing sound, a series of beeps is emitted.

If you hear a series of beeps, you should count them as this will help you detect the cause of the problem.

Number of Beeps	Meaning
0	• If you hear the buzzing audio signal: system OK
	• No buzzing audio signal: no power, PC is unplugged, power supply is down or system board has failed.
1	Processor absent, not correctly connected or processor socket not closed
2	Power supply is in protected mode1
3	No memory, bad memory modules, incompatible memory module
4	Graphics solution problem
5	PnP/PCI initialization problem
6	Corrupted BIOS. You need to activate crisis recovery procedure.
7	Defective system board

1.Typically this is as a result of a system board problem, and not a power supply unit fault.

Note that for Memory (code 3), Video Card (code 4), and PnP/PCI (code 5) errors, e-DiagTools preboot diagnostic will only detect them after a 15-second timeout.

If you miss the beep code, turn off the PC. Then press the on/off power button for five seconds or more and listen for the signal again.

The e-DiagTools preboot diagnostics, as well as emitting a beep sequence, also encodes troubleshooting information (such as the PC model, serial number and failing components) into a coded audio signal. During a support call, this coded signal can then be decoded by the HP Service Provider to provide immediate and effective assistance.

52 Evo D310 Micro Desktop