Problem w/ BIOSTAR TForce 6100/NF 410, Socket 754

I may have had a virus, but now the problem has really started... my
machine was being very sluggish so I rebooted and then I couldn't get
past the windows XP start-up screen with the scrolling blue bar near
the lower center. So, stupidly, I restarted again and went into the
bios and reset it to the default. Now I can't see anything. I get
one beep and the keyboard flashes when I turn it on now but the screen
stays blank. I think the connections are all good -- I've got
everything plugged in -- but I can't even see a bios screen or
anything now! I'm not the most savvy comp user and I don't have the
manual. Even if I did it might be Greek to me. Does anyone recognize
this problem and can they explain or link me to a few possible
solutions? Is there something I need to reset manually on the
motherboard? It's my primary machine and I am at a real loss right
now.