[Pc Wont Reboot]

Hi, I've just installed a new motherboard/CPU and, and power supply on my pc, and at the same time i've also installed a new winxp pro installation.

Everything works fine: The only thing is that when I go to "start > turn off" and choose restart; the PC starts to turn off everything just like normal till the blue microsoft windows screen , and then it stays there. Basicaly the pc wont restart, but it turns off normaly when choosing "turn off" .

After inomerous trys I went to the component store and we find out that by removing my old tv tuner from my MO would fix the problem; everything was running great.

I came home, conected my screen, my mouse, and again "it wont reboot"

I really dont understand, it s very weird, the only diference is the my mouse and keyboard, wish are wireless:

What it could be?

thanks

PROBLEM SOLVED

one of the small metalic parts behind the MO where the screw go in, was touching the electronic circuit.

THANKS