This sounds almost exactly like the problem I had.
Do you have a computer repair place near you that will do a diagnosis? I'd recommend taking it in and having them look at it. Tell them exactly what happened. That it's not POSTing etc.
(You can leave your hard drive out of the box if you're paranoid about security like I am. They can test the computer CPU and POST test without it. If they say they can't, take it someplace else. Because they obviously wouldn't know what the hell they are talking about in that case.)
In my case what actually happened was completely counter-intuitive to what I thought had taken place. Everything I knew pointed to the motherboard being fried. But it was actually the power supply and the Videocard. Weird, but that's what happened. If your system can't POST at all. Likely the first part of the problem is the Power Supply. If that is replaced and it posts, but doesn't get video, then you have a video card issue as well. If it POST tests, you can see the screen, but nothing happens and there's no CMOS/BIOS then probably motherboard/CPU.
Do you have a computer repair place near you that will do a diagnosis? I'd recommend taking it in and having them look at it. Tell them exactly what happened. That it's not POSTing etc.
(You can leave your hard drive out of the box if you're paranoid about security like I am. They can test the computer CPU and POST test without it. If they say they can't, take it someplace else. Because they obviously wouldn't know what the hell they are talking about in that case.)
In my case what actually happened was completely counter-intuitive to what I thought had taken place. Everything I knew pointed to the motherboard being fried. But it was actually the power supply and the Videocard. Weird, but that's what happened. If your system can't POST at all. Likely the first part of the problem is the Power Supply. If that is replaced and it posts, but doesn't get video, then you have a video card issue as well. If it POST tests, you can see the screen, but nothing happens and there's no CMOS/BIOS then probably motherboard/CPU.