Ok, heres the problem, Ill try to list off all the information that might be relevent that I can. Recently I purchaced a ethernet card to use for my familys old computer. I had to take out the modem to put it in. Since I was not inticapating haveing to swap the cards, I did not go to the remove hard ware thing in the control panel before hand. The computer is very old, like 5 years, and it was cheap to (arownd $200 after a nice mail in rebate).Me and my dad had much difficulty getting the ethernet card in. Its possible we damaged the mother board but seams unlikaly. After we got the card in, I unhooked the CD drive and replaced it with a new DVD burner from my computer. I did this becasue for whatever reson the CD drive on the old computer died about a month ago. I needed to run a CD to configer a wireless router. I was planing to use the DVD drive just log enouth to do this then put it back in my new computer. So I hooked everything back up again and pluged in the power cable. The green light on the power supply turned on (does that as long as its pluged in, on or off), then imediutly flickerd off. I tryed moveing the cable arownd only to get the same result. Although possible, it does not act like a short. When we tryed moveing the cable arownd we couldnt get the light to stay and when it did come on it flickerd off in the same amont of time each time. We tryed lots of stuff untill we evently put the modem back in and the old malfuntioning CD drive in and tryed then. Still no luck. To our knowledge, we were grounded threw touching the case the whole time (the case was touching the table threw ruber feet though, if that would effect it). Also, the computer has never been cleaned untill a few minets ago while typeing when my dad cleaned it with a vaccum cleaner. Nothing has changed. I hope I have provided enough info lol. Please help! Thanks