i've experienced both the keyboard and the ps2 socket malfunctions
fastest and easiest is to just get a usb jump off
i'd get it now, before it breaks again
if you are limited with usb space you can get a hub, or if you're running some archaic type shit look for one that comes with usb to ps2 adapter, so if it turns out to be the ps2 you can fall back on your usb and just have to deal with losing a port
i prefer wired connections over wireless