1978 RCA Selectavision VCT200 top loading vcr to going into play

[pac.attack76]

Pulled this out the other day and I'd like to get it running but all it does is rewind and fast forward. Pressing play starts a sound you can hear down inside but the two arms that take the tape up around the drum won't move. I found that I was able to move them up forward myself but I don't think they should be able to move that freely. Doing this did start some rotation and belts spinning but that's it. All belts are good. Any ideas on where to start on this. I would tear down to those arms but I would need some kind of steps. There's metal and screws everywhere down there. Assuming these arms have detached from something.