Yesterday I recived my components for new computer. I put it together and found realy bad problem. I pluged monitor and keyboard.... Then I started it. But there was no POST, just a beep. I think it was a long beep, and that means that everything is OK. When I pushed power button, monitor (CRT) came from stand-by to working condition. But there was no picture on it. Second later CPU fan slowed down and computer beeped. I tried booting computer without DVD and other drives but no luck either. I tested graphic card and it is working. Then I tested power supply and it is working too. I can't try any other components here. I removed RAM and computer didn't beep and monitor was still in stand-by. If I remove graphic card computer beeps the same as before. I don't know what is wrong.
maybe ram isnot compatible with your m/b. for example, 2 channels of my kingston ram 512MB ddr2 533 some times was working & some times not. so i changed it with dual geil ddr2 533 & now is working properly.
so if you have 2 modules, check again with one. else try another ddr2 memory.
at last, if the problem was remained, the only way is checking VGA.