ADM3A Screen Rot

I Have Three ADM3A's that sat in my Barn for Years. The Field mice made there home in two of them. One of those has a bad motherboard that might not be salvagable [Mouse Crap all over it] though I might soak it in warm water come Spring then blow dry and treat with 90% Isoprpyl alcohol but there is bound to be some Corrosion. One is still in the Barn but I plan on bringing it in when it gets WARM and see if I can SWAP the Top W/the CRT onto the one Unit that has a partially working M/B. It lights up my Breakout Box but Shows no Cursor but the tube Dies down to a Spot in the Middle when Turned off. I tried the one from the Bad M/B and it just Buzzed. If anyone is interested in the CRT's let me Know. If I can't get one working I can get something for the Aluminum Casings. But Maybe someone can use the CRT's. They look OK to me but I'm not familiar with SCREEN ROT. Shipping the whole Unit would be just to expensive. Maybe the One M/B is still useable???? Bob in Wisconsin