Keyboard not recognized - Can't Boot

[nmmnp]

I was checking a network issue so I moved a PC to another room. The PC whose connection I was going to use has the same Logitech wireless KB/M as the PC I was checking so I just plugged it in and booted. Well the wireless wouldn't work, the recevier didn't even light up. I connected an old wired keyboard and it wouldn't work but I tried a second one which did. Finished checking the network issue and moved the PC back, but now, no keyboard will work. The PC's original wireless doesn't light up and I've tried 3 different wired keyboards and a USB model and am stuck. Tried resetting the CMOS but it now wants me to hit Delete for setup or F1 to continue. Shouldn't the leds on the keyboard flash when the PC boots up? (they don't) I wish I hadn't tried to clear the CMOS, maybe the USB Keyboard would have worked when I plugged it in... Anything else I could try before the motherboard goes in the trash? Could both ports crap out at the same time like that? Thanks in advance...

 

[corkyg]

Maybe your BIOS does not have LEGACY SUB enabled? If you don't, the USB ports are not activated until your OS loads.

 

[nmmnp]

Cleared the CMOS again, this time by removing the battery and the keyboard now works...