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3 Troubleshooting Your HP PC Workstation
Pre-Boot Diagnostics
58
Pre-Boot Diagnostics
When your PC starts up, the 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. 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.
Please note that for Memory (code 3), Video Card (code 4),
and PnP/PCI (code 5) errors, e-Buzzer will only detect them
after a 15-second timeout.
If You Miss the Beep Code
If you miss the beep code, turn off the PC by pressing the
on/off power button for five seconds or more, then listen for
the signal again.
Number
of Beeps
Meaning
0System OK
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