Computer won't turn on, believe power supply, second opinion needed?

Pull all the "plug in" cards from your PC. Unplug the hard drive and DVD.

Then see if it Power's On. If it does, problem might be elsewhere - could still be the Power Supply though, just not putting out enough juice to run your systm.

Hi. Grinding sound is usually either a fan or a hard drive. Strange that the power cord will sometimes get the system running for a while. If the sound is from the PSU fan than yes, I would replace the PSU. My opinion.

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Sounds like your CPU fan went out (that would be the grinding sound you hear) when these go out and they are not changed immediately then your CPU chip gets fried and possibly your motherboard. So most likely you will need a whole new computer or if you think your up to the challege installing a new mother board and CPU chip.

Be warned the chips pins are VERY easily bent.

Anyone you know who knows alot about computers? Have them look at it. I would suggest turning the power supply off and then back on and see if that helps. Worst case senario you could take it to a computer tech and have them just give you a price to fix it only and they might tell you whats wrong with it so you can fix it yourself.

Check the fan in the PSU, if it is working, then your motherboard is probably dead. Check the fan for the CPU, if it isn't running there is a 99% chance the board is dead. Check to make sure the cables from the PSU to the board are connected securely.

Sounds like your computer may be overheating. Try cleaning out your processor's heatsink. Make sure all the connections are plugged in. Only other thing it could be is your motherboard may be a goner.

Can you see or hear the fan running, if not it would suggest your power supply is u/s

could be the power supply. the grinding sound doesn't sound like a power supply issue though. ...sounds more like the HD on that one...

u sure all the wire are plugged in at the back?? as your light is on it may just be your screen, check the wire at the back of the screen to see if it is plugged in, it maybe but you may need to likepush it in better...