when ever i start my computer up now, it doesn't seem to work. after pressing the power button the computer itself turns on fine. i can hear the fans running and it sounds normal. but my monitor will not show anything. it is just black with the power lights blinking. i have tried to switch the monitor out but it still has the same problem. i asked a friend of mine and he said that it sounds like the video card. well i had a hercules 3d prophet 4000xt which i switched out for what i have now, an ati radeon 9550 (agp). the sound is not working either, when it is supposed to play the windows theme, it doesnt (even though i can't see anything on the monitor) i am not sure what is causing the problem but hopefully you guys can help me out.
here are some computer specs if it helps:
-originally hercules 3d prophet 4000xt video card (now an ati radeon 9550) agp
-256mb ram (just tried adding 512mb)
-pentium 4 1.6ghz