A few days before Christmas my power supply blew. The capacitors inside poped and so I needed to replace it. Finaly managed to replace it the other day and everything seemed fine however yesterday my pc crashed randomly when my daughter was using it and had trouble turning it back on. Randomly it started working again and then again today it shut off and I have not been able to get it going again. It doesn't post or anything the screen just stays black. Is there a way to test the motherboard at all? I do not have a spare cpu or any other parts to try.