Mike,
Firstly, welcome to BeoWorld!
To deal with your problem, understand that these are not quick-fix units. But they were built to last a lifetime, so certainly worth restoring.
Take a look at one of the posts I've written on this model - http://forum.beoworld.org:80/forums/t/12646.aspx
More specifically, understand that transistors do not just blow willy-nilly, the underlying cause is usually bad capacitors, and these old BeoGrams are notorious for requiring a complete capacitor replacement - parts and advice right here.
For the solenoid not lowering (assuming that you've taken care of lubrication), it's probably a capacitor problem - not enough stored energy by the big power capacitors adjacent to the turntable motor at the front-left.
Menahem
Learn from the mistakes of others - you'll not live long enough to make them all yourself!