No power to PC

  RussG 15:57 06 Aug 06

My son is bulding a PC for someone, his second attempt at this. Took him a couple of hours to put together and he was doing well. When he flicked on the switch at the back of the PC there was a high pitched squeel, so high I couldn't actually hear it at first, (old age deafness)though it is not a loud squeel by any means. Nothing happened when he tried to power on either. He has checked and rechecked connections. I have tried to not get involved too much as this is his project but I suspect the power unit is faulty - (due to the high pitch squeel).
Anyone had similar experience or can offer some advice.

  Fruit Bat /\0/\ 16:43 06 Aug 06

Squeal can come from several places

Fans is usual cause (bearings) sometimes ribbon cable catching on fan.

Hard drive is another

or even CD/DVD motor as it spins on boot.

No power is worrying, does PSU fan turn?

any leds or hard drive noises

power up with just motherboard + cpu + 1 stick of memory what happens? should bep for lack of graphics.

  Fruit Bat /\0/\ 16:44 06 Aug 06

4 pin plug next to CPU inserted?

motherboard shorts to case is another cause of loss of boot.

  RussG 17:16 06 Aug 06

Thanks - I'll check these out and come back later.

  RussG 18:33 09 Aug 06

Motherboard shorted to case - thta was the problem - all sorted now. Thanks

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