I recently swapped my gpu, and everything worked fine except for the fact that my (very old) PS2 keyboard wasn't responding. It didn't even show up in the device manager. When I restarted the computer, the num/scroll/caps lock lights would briefly turn on and of but then nothing happens. The keyboard is not broken, it works fine if I plug it into my other computer's PS2 port. I also have a USB keyboard, and that one also works fine on both PC's. I've made sure that PS2 Support in the BIOS is enabled, but the problem persists. What can I do?