Ok so like a total idiot i put ddr2 ram in a computer with a ddr3 motherboard and now whenever i try to turn the PC on it turns on for 5 seconds then turns off. And it continues to do that untill i turn it off. I don't know Why it does this but it might be because when i replaced the ddr3 ram the ram got some scratches and a little dent. So Idk what whetever the problem is that the ddr3 ram is broken or that something else is broken.