Hello, recently after about 2 months trying to get a chipset fan for my mother board i finally got one off asus under warenty, (my other one stoped working) anyway, i fitted it turn computer on, it all starts up and everything but i got a long bleep followed by 2 bleeps meaning graphics card problem. (i think?) the memory im using is compatable with the board i checked on the site, there is nothing displayed on the monitor but my grpahics card starts (lights up and fan turns). the leds on the memory all flash like a christmas tree to say its working fine, also the optical sound port doesnt light up. i changed the memory it worked once then didnt again!? does anyone know whats wrong with it? thanks for your help