Question about HP PC Desktops
You may try:
1)open cover take out all exterior devices like cdrom/HD/PCI card/AGPcard then power on, go next if nothing change.
2)open cover see any fan turning when power on , if nothing run, check biger power supply plug pin(Ps-on and 5Vsb)all at 5V are OK, less than 3V or nothing is power supply box damage. change new power box to test. still same trouble go next
2）open cover you can see a LED light on on the motherboard
and check power on button is working well(switch).
3) check all biger capacitor top, any one bulged shows motherboard DC damage and need to repair by PC specialist.
4) nothing change above, you have to change motherboard.
Posted on Dec 21, 2008
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