I'm having this problem with my PC. When I turn it on the cpu fans turn on but nothing on shows up on screen and there is no beep. On third or fourth attempt the PC beeps, boots up and it works perfectly fine. It seems like it needs to warm up before every time i turn it on. I have taken the whole motherboard out of the casing and took everything off except the cpu and rams but still having the same problem. I also tested the power supply and its fine. I tested other rams but same problem. Can anyone help me solve this problem or let me know is it the cpu or the motherboard that is faulty.