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4 BIOS Overview
HP e-DiagTools Preboot Diagnostic (Beep Codes)
HP e-DiagTools Preboot Diagnostic (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
you graphics controller has failed), it will emit a buzzing sound. This is the e-
DiagTools preboot diagnostic. 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.
NotethatforMemory(code3),VideoCard(code4),andPnP/PCI(code5)
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, then listen for the signal again.
The e-DiagTools preboot diagnostic, as well as emitting a beep sequence, also
encodes troubleshooting information (such as the PC models, serial number,
and failing component) 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.
Number
of Beeps
Meaning
0SystemOK
1 Processor absent, not correctly connected or ZIP socket not closed
2 Power supply is in protected mode
3 No memory, bad memory modules, incompatible memory module
4 Graphics card problem
5 PnP/PCI initialization problem
6 Corrupted BIOS. You need to activate crisis recovery procedure.
7 Defective system board