My brother gave me his computer that he had a little over a year. The motherboard fried so, I'm attempting to fix it. I have replaced the motherboard with a Soyo SY-KT600 plus, replaced the case and connected everything to the motherboard. I have a 250W power supply and when I power up the computer everything seems to operate correctly. The lights on the motherboard lights up, the CPU fan is operating, the lights flash on the CD-rom, I have the correct memory. The motherboard is a socket A and I have a Duron CPU. Like I explained everything seems to be in working order but I'm not getting any video the moniter is black and goes straight to hibernation mode when I turn it on. I'm not sure if the AGP card is bad or what. I get no beeps when I power up the computer. Please if someone can help me out I would really appreciate it.