The subject line says it all; my father and I about a half year ago or something, were watching a video on his computer when it just all of a sudden just died for no reason; it was plugged in and was running on AC power, though the battery is still good. And then, right in the middle of the video, it just died; lights went out, and then it would not turn back on no matter what we did, whether we had it plugged in or not; I even think we tried a different charger as well, though that was kind of pointless since the battery was running at 100 percent anyway. I'm really curious what could be causing this, for I would like to fix this computer for him. It has an intel board, I think, with a Core 2 Duo T5400 processor running at I believe 2.4 GHZ or something like that, I'm not sure. It was running Vista the last time I ever saw it run. I'm wondering if this is more of a power supply or board issue, for I want to ensure that I purchase the right part the first time and not go hunting for the wrong thing unintentionally. What do you guys think based on the symptoms? With my years of being with technology since 2008, I've gotten quite good at figuring out hardware related issues, but this one's a little stumper there; I can't figure it out. I think it's the power supply, but other folks I have brought it up to on places like YouTube think that it's the board. Now, interestingly enough, I remember when my father would start up this computer back when it would turn on and work, he would get those messages about "bad image" on the logon screen, and I know that that can be either hardware or malware related, and this little Dell Inspiron certainly has had it's share of malware on it that I would have to clean off, but I'm wondering if the signs were there, I just didn't know how to interpret them back then? Thanks for any help; it's very much appreciated.