A few months ago I bought a M5A 78L-M USB3 motherboard for the computer I was building. I have finished building it, when I start it up I get the American Megatrends Inc screen. Soon it tells me to press F8 to get to the BIOS Boot up screen, if I do so, a change happens ont he creen saying that it has been selected but nothing happens. Afterwards more messages are formed and it tells me my CMOS date/time i snot set. I have changed the battery but stil get this. I later discovered if I pressed Alt+shift+Delete I get to a BIOs screen, upon doing it I have a few options such as F8 for the selection screen to allow me to choose where to boot from. I need to boot from disc. The problem I face is when I press F8 nothign happens. No matter what I press nothing happens and it soon goes back the the American Megatrends Inc screen. I have tried reinstalling the BIOS from a memory stik but still it does the same. Any ideas?