Wierd probolem, for anyone who's interested. Major one too, but not urgent.

[BlackMetalWareWolf]

I have had my first legitemate computer build, about 7 times now. this thing has been taken apart and rebuilt far too many times. its because I have this strange probolem. I cannot boot with a warm computer, literally. I need to wait for it to cool down before it can be booted up.

If I do try and boot it up straight after a shut down, or try a regular restart I get the issue of all the LED's, fans and the hard drive power on, act as normal aside from the HDD activity LED doesnt go through its normal routines of blinking intermittently. I cant power off aside from using the actual OFF switch on the PSU. Whole this is happening the motherboard indicates a probolem with the CPU, despite the fact both the motherboard and CPU have been replaced already for this exact probolem. I cant have two faulty pieces of hardware twice,l the odds are rediculous.

I have double and triple checked the motherboard and processor are compatable.. and they have to be. otherwise I wouldnt have been able to get windows onto it and find the whole PC works perfectly. its just this one probolem I can't for the life of me wrap my head around. It isnt overheating, the whole system is brand new and yet it refuses to boot up properly untill I let the PC get utterly cold.

Specs, doubt they're nessicary. this seems more of a generic probolem than anything specific to me. there are others running roughly what I've got, and people with utterly different PC's and the same probolem. laptops mainly.

Otherwise, when it boots up it's fine. it doesnt crash, it doesnt freeze, turn off or anything. But it is worrying having this requirement to cool the PC down 100% before I can use it.

RAM
- 4 gig, DDR3 @ 1333mhz by corsair

Processor

-AMD PhenomII X6

Motherboard

-ASUS Crosshair IV Formula

GPU

-ATI Radeon 5870

Hard drive

-standard 500gb sata, and a bunch of external I had beforehand that bring things upto ~2tb.

PSU

-700W

[dieselfuelonly]

Any burst or bulging capacitors on the board? Would also be worth testing the memory to make sure there are n oissues with it.

[theneomaster]

It sounds to me like a dodgy PSU. If its a generic one, then my guess is the wires, capacitors or circuitry are dodgy, resulting in a clean bolt of power up discharged wires to turn it on. I'm pretty sure my libretto UMPC has this issue, so it can only start from a cold boot, a discharged state or the moment a power source is connected. (durr, don't take my word for it, I'm not an electrician) But try disconnecting every device one by one first, including the sound card (if any), graphics card and memory.