That indeed was normal. Actually that was a question I was asked more than once, having formerly been a Radio Shack computer marketing manager back in the mid 80's.... back when Radio Shack was still a company worth working for. Pity what they've become.
I'd try some of the proper cleaner, if it works, it's a temporary fix but you'll know what the problem is and can replace the old variable pots. DO NOT USE WD40!
OK, great, one worry down then, I kind of though the diagonal lines might be an video artifact, I've seen some many model 4 show them.
I'll go see if I can find some good contact cleaner to the horizontal hold tomorrow. The last contact cleaner I bought works.. but attacks plastic big time... I have never even used WD40 I haven't noticed the horizontal hold knows, are the on accessible from inside?
And I agree, Radio Shack isn't what it use to be, long gone from Canada, it's successor "The Source" is just a over priced consumer electronic store with clueless staff..
I once had a job offer from one of the Tandy Computer Center stores, but came down with a nasty flu and ended up having to pass on the job... It was sooo disappointing..
Edited by Atari-Collector, Mon Jan 19, 2015 4:27 PM.