I took my IBM PCjr and its display out of storage, powered it up, and encountered this:

It appeared to be missing some colors – mainly blue.

I took the display apart and removed a metal shield from the neck-board. When I powered up the display there was nothing displayed! It took me a few minutes to realize that I had ripped off a trace which was soldered to the metal shield. I should have been more careful, but it was an easy fix…

Thanks to a user on the VCF web-site I was able to isolate the fault to a short in one of the capacitors on the neck board. I snipped one of the capacitor’s legs and the colors immediately returned! I replaced the cap and put the display back together. A quick fix thanks for the VCF community!

Happy to be back up and running again! 

PS: yes… this is a fast PCjr  🙂