I have a ASUS A7S333 mobo and the processor is 1ghz AMD and I am going to replace it with a 2ghz processor amd and I did check the specs and the processor will work . I did replace that now I just get a blank screen then I put in my old 1ghz processor back in and still get nothing but a black screen.The steps I took,#1 Took everything out and seated it back in #2 took the cmos and put it back #3 make sure that my monitor is plug in right .Now when I boot it up I have to use the power botton in the back before it was the front one and my cd-rw light keeps flashing and making a knocking noise every second no beeps though.So it boots up the light on the mobo (led) lights up ,cpu fan working,hd working .I guess everything else is working cause I hear no beeps.But still no picture. Before I added the new processor everything work with no problem. Any help would be great.