Hi, I was wondering if any of you guys know potentially what the problem could be ;D

Ok, so my housemate recently had real problems with his PC. It wouldnt boot at all. In fact, no USBs worked, the screen wouldnt turn on (when he switched on the computer this is). And the graphics card fan is visibly very very loud.

Since then we replaced the motherboard and as a result everything has worked fine the past couple of days. However this morning, once again. Same problems. Monitor doesnt turn on, usb ports dont work (i.e. nothing lights up, etc.). Graphics card fan is much loader than usual. So basically, nothing seems to work?

What could be causing this problem . Tried googling but found nothing so help very appreciated! ^^

I had the same problem under two circumstances:

1) I had a faulty motherboard
2) I had faulty memory

the motherboard is new so I would doubt it would be that. Although it could be faulty of course lol.

Could be the RAM I had exactly the same problems when I had faulty RAM.

Yeah, RAM is very likely the problem there. If he has multiple sticks, try single sticking with each stick available in each slot.

Yeah, I'd say it was Mobo or ram issues tbh...

The old big PC we had had something similar, except nothing ran at all. That was a mobo issue, so this looks to me more like RAM.

tried all ram doesnt work xD.

tried my ram, doesnt work xD

Mobo issues then

Or processor, or GFX.

Intermittent power cables?

or anything!

Bring it round to my house i'll see to it.

Provided you also bring your hot self.

My next suggestion was going to be not the power cables but the power supply itself. I've had similar problems when my Turbojet 1kW was on it's way out (then finally popped and smelled like mercury)