I recently bought a computer that wouldn't start for $100. I replaced the motherboard and everything started working perfectly. However, when I was moving the processor from the old motherboard to the new one, I somehow managed to forget to screw in the processor fan/heatsink. With only thermal compound holding it together, the fan/heatsink fell off without my knowledge and I think the processor overheated. Whenever I opened the case I found it detached. I applied more thermal compound and screwed it in hoping it hadn't overheated. Whenever I turned on my computer everything started normally except instead of Windows starting I received a message saying that the bios were missing. After I told it to search for them, the screen just went black. I walked away and let it do its thing. After about 18 hours the screen was still black so I decided to restart it. Now whenever I turn it on the fans will start up but the screen stays black. My monitor acknowledges that it's connected to my graphics card but I'm not seeing anything. I thought it might be something with my graphics card, so I took it out and connected the DVI cable to the integrated graphics, but it's still black. So I'm going to assuming it isn't anything to do with the graphics card (correct me if I'm wrong). Any help or insight anyone can offer will be greatly appreciated. I would hate to buy a part that I don't need to replace. Thanks.