My friend asked me to come over to her house and look at her PC, which had started emitting smoke from the power supply. She said that she smelt burning for a while then there was a puff of smoke from the power supply and the machine went dead.
I opened the machine, removed the power supply and opened this up. There was a small heat/burn mark on the PCB but no major damage.
I recommended she get a new power supply unit, hoping that nothing else had been damaged. When I installed the new power supply, the machine is still totally dead, the LED on the motherboard lights up but the machine wont power on at all.
Pushing the power on button has no effect, the hard disk, fans, cd drive etc dont come on.
Anyone have any idea what could be causing this, would the PSU have damaged something else on its way out?
