Daniel,
This link will invite you to the Radio Shack Color Computer "Coco" discord:
http://discord.thecoconation.com
There find the #machine-restoration channel (categorized under Hardware).
Those folks should be able to advise you.
Also there is a more generic "Tandy" discord, but I don't have an automatic
link to invite you to it,
but folks on the Coco discord can do that, or contact me directly (AT
yak.net USER strick EMAIL).
-- strick (sorry late; was camping a week)