Hi, I bought this pre-assembled PC on April 2010 in Italy.

Now I am experiencing frequent freezing problems. When I restart PC right after, it also hangs on the black boot screen saying "SATAI_1 autodetecting..........." .

I brought the PC to a tech lab here and they say there is a problem with the built-in motherboard power supply which provides power to the hard disk.

He suggested to bring the power from an outside source but I am more keen on substituting the motherboard completely.

Now the question is: which motherboard would perfectly fit this PC's case and all? I just cannot figure it out!
Please help...

Thank you!