repairing eary zenith space command sets

[USSEnterprise]

I just picked up a Zenith Space Command 300. I got it cheap, and when I get it working, it will go toward a TV exhibit at the Radio Technology Museum, part of the Infoage Science and History Learning Center where I volunteer.

The set powers up, and I get snow and static, as I have not connected to a source yet. The motorized tuner works, but it does not react to the remote. I do not have the matched remote, but one from a similar model. I was told that the frequencies are the same among space command sets. I have also heard that the remote control chassis is prone to failure.

I have not obtained a SAMS sheet yet, but will soon.

Thanks for any advice
Joe