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The problem is as follows: I just got my dad's computer and have (had) a bunch of MBs, AM2 processor standing out.

His AGP slot had some problems and the computer refused to start with a video card other than the on-board card.

1 week before:

  • MB1 - processor 1 - power 2 => perfectly working
  • MB2 - processor 3 - power 3 => perfectly working
  • MB3 - processor 3 - power 2/3 => perfectly working

Replaced his MB with a mb of mine (MB1), but left his power supply (which to be honest, apart from the 24-pin connector had another one with 4 pins connected to his MB) and tried it.... The results are as follows.

MB 1:

  • processor 1 - power 1 => smells burnt and make annoying sound (possibly mb voltage regulators)
  • processor 2 - power 1 => same
  • processor 2 - power 2 => same

Replaced MB1 with another MB of mine.

MB 2:

  • processor 2 - power 3 => smells burnt and runs for a couple of seconds
  • processor 3 - power 3 => smells burnt
  • processor 2 - power 2 => same
  • processor 4 - power 2 => smells burnt instantly

And finally changed everything except the power 2 (which was perfectly ok 1 week before)

MB 3:

  • processor 4 - power 2 => smells burnt

Is it possible that power 1 burnt MB 1 which in turn burnt processor 2 and power 2 which in turn burnt MB 2 and 4 and processor 4?

I know it sounds crazy, but is it possible to get them burnt in chain???

I'm very curious what I got wrong, because I now have 4 MB, 4 CPU, and 2 PSU apparently broken, and I don't want to burn the last ones.

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Are you sure that the surface you are using isn't conductive? You can test power supplies without having to have a motherboard attached, google for more info (it usually involves attaching a hard drive for some baseline load and bridging two pins on the ATX plug). – Ruairi Fullam Jul 6 '11 at 14:27
I'm testing on the carpet – Andrei Jul 6 '11 at 14:31
Carpet = static electricity = fried components. I would at this point put everything down and solicit the services of a professional. – LawrenceC Jul 6 '11 at 15:37
It's hairless carpet... It can't generate any... – Andrei Jul 6 '11 at 17:14
Does your mainboard has some configuration jumpers for cpu bus ratio and stuff like that? – Sean87 Jul 31 '11 at 17:45
up vote 1 down vote accepted

If a motherboard has faulty power circuitry, it can very well burn several processors. Processors burning motherboard? Sounds very unlikely.

Start by testing the power supplies independently: "To test the basic function of an ATX power supply, short the Green wire with one of the grounds. This should turn the power supply on."

When doing this, put some load, like a fan or hard drive, to the power supply just to be on the safe side.

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