A20M keyboard problem please help

[ticktock]

Hello i have a A20M 2628-4SU p3 700, I was upgrading to xp pro from xp home and at the same time installed a new wireles g network card a Linksys. After this i noticed i could not type anything but the mouse worked. I looked a little closer and it seemed that the FN button is locked on as i can dim the screen and switch to ext monitor etc. It would reboot to xp but i could not type. I tried a new keyboard it did the same thing an external ps2 keyboard will not work(but a mouse would). So i tried resetting the bios by pulling the cmos battery so know i cant get past the bios setup window as the keyboard wont work. Linksys doen't know anything and IBM recomends flashing the bios but i cant because you need a keyboard to use the ibm flashing util. What can i do Thanks Jean