No Boot but power on

  cooke401 12:55 02 Jun 2008
Locked

My PC has been switching off by itself and restarting. then yesterday i switched it on. No screen activity, power light on mb. power light on pc. no boot light activity. could this be a fault with the cpu power supply.

  ened 13:00 02 Jun 2008

Not really enough information but it could be overheating.

Check the Heatsink for the processor.

  cooke401 13:14 02 Jun 2008

ened

cpu fan and pc fan working ok

cd drive and hdd light on, on initial boot then no further indication of boot. no screen activity to get to the bios, that why i thought it was the 4 pin psu to the cpu.

  ened 14:42 02 Jun 2008

It still could be an over heating problem.

Check the Heatsink is locked down properly.

I had similar symptoms and one of the feet had not locked down.

  keef66 14:44 02 Jun 2008

Can you try another (known working) power supply? That would be my bet.

  Fruit Bat /\0/\ 17:38 02 Jun 2008

If fans and hard drives working (flashing led + noise) but no screen, maybe your monitor no switched on / powered or graphics card / cable problem.

  woodchip 17:42 02 Jun 2008

I go with faulty PSU. Lights mean nothing with a PSU. Nor does Fans running

  woodchip 17:43 02 Jun 2008

Do you get a ONE post BEEP when you start the Comp? or as it never BEEPED?

  POiZN 18:05 02 Jun 2008

Twice with me it's been the motherboard, once the Graphics card and sometimes the CPU fan was spinning but faulty, I think it was telling the mobo it wasn't spinning.

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