My desktop blue screened and I had to reinstall win 7 and everything else. (Gave me something to do) So I have just bought a mainboard testing kit from Maplin, that includes a motherboard speaker, hoping that I would get some indication of the problem if it happens again. However - when I switch PC on it doesn't beep! checked settings at startup and cant find anywhere to turn it on. Anyone got any ideas. Couldn't work out if there was a correct way to fit it but noticed the speaker plug had an arrow on one end and there was a vey small arrow on motherboard - so put them together.