Suggestions on a Zenith R723 Radio

[Keefla]

ok all. me again. I re-capped the set with the exception of the electrolytics (so far). and powered it up to see. I have new caps for the electrolytics, which it seems i will need to use casue the can gets moderatly warm and there is a slight hum. And about the hum....thats all i get. that and static when i change bands. when i put the soldering gun on the wiper of the volume pot i get a buzzing, so it would seem the output stage is ok. but nothing on AM or FM at all. Any ideas on where to begin. all the paper caps are gone. there seems to be a molded plastic cap with 3 colored dots on it. I should have a replacement for it. is this usually a reliable cap? I doubt it would kill the AM and FM thow(??)
Any ideas on where to start? im new to this so be gentle.

thanks again