Hi guys,
Hope to get some help from here

I am having this problem with my Unicomp whereby if I try to type the ":" character, nothing happens. The keyboard however does register if I hold down the ";" key and the right "Shift" key instead.
The funny thing about it though is, my ";" key works. My left "Shift" key works as well, but the two just don't seem to work together.
Another thing that I've noticed is that from time to time my keyboard does goes on a runaway and keep going "000000" after I've pressed on the upper "0" key. Could my problem with the ":" character be caused by a stuck key?