i had a problem similar to this..sort of, i had a USB mouse and a regular keyboard but, i dont remember which it was, one of them wasnt working or maybe both werent working. My bro just took me to the store and i bought a new keyboard (Saitek eclipse with LEDs same color as my towers front..plasticy picture things.) that attatched through USB and everything worked fine you might have to do that, my keybord was $30 but im sure you can find one cheaper..or maybe not im not exactly up-to-date with keyboard prices