PC shuts down after a second

  s99Raj 14:29 26 Dec 07

I have a desktop that shuts itself off after the initial single beep. If I leave it, then 20/30 seconds later it restarts automatically but then switches off after the intial beep.

The processor fan is spinning OK. I've tried changing the graphics card, the RAM and the PSU but get the same problem. I've removed all but the graphics card from the PCI slots.

What could be wrong?

  Technotiger 14:55 26 Dec 07

Has this only just started happening, was it all working ok previously?

What OS and other peripherals?

With the limited information, it could be either duff CPU or motherboard problem.

  s99Raj 15:02 26 Dec 07

No, it's been there a while and used to switch off irregularly, i.e. it worked for a few hours before switching itself off but I could wait a few minutes before turning it back on again.

Now the problem appears to be more permanent.

  Technotiger 15:10 26 Dec 07

Hmm, sounds like the CPU has died probably due to over-heating in the past, which has not been recognised and sorted.

  s99Raj 15:14 26 Dec 07

OK - thanks for that.

  Technotiger 15:16 26 Dec 07

If you decide to replace the CPU yourself, don't forget the Thermal Paste!

Good luck.

  Quiller. 15:17 26 Dec 07

It sounds as if the cpu is damaged.

Take off the fan and heatsink and check if has any paste on the chip. See if it shows any sign of damage, clean it and add new paste and try.

  woodchip 17:38 26 Dec 07

CPU overheating, check the fan and heatsink not blocked

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