I been trying to figure this problem out this lass week. Well I been leaving my comp. On overnight and one day I was planning on using it, when I noticed it was turned off. I thought someone else I the house turned it off so I thought nothing of it. So I tried to turn on the comp. nd all it did was turn on for about 5 seconds then turn itself off. So I just unplugged it and left it alone for a few days. After a few days I went back to check on the computer, but this time it actually stayed on but the monitor, keyboard, and the mouse wasn't working. The keyboard lights will flash at start up but after that I can't get it to do anything. The monitor and the mouse will work on another computer but not this one. But yea so does this have anything to do with the mother board???! Do I need to replace it?