Makar Zaverucha

When my power supply finally blew out again, I decided that I should just buy one off of ebay. My previous sautered power supply had half of the recommended wattage. It blew out in about 3 weeks. I bought the power supply off of ebay for about $20 and it came in two weeks. I put in the power supply and the computer worked fine until the monitor started shutting off again. The computer was still on but nothing appeared on the screen. This would happen everytime I turned on my computer. I tried installing a new NVIDIA GE Force 156 Mb graphics card but it still did not work. Right now I am thinking about buying a motherboard off of ebay and replacing it with my computer's motherboard. I am almost positive that this will work.