Sylvania Halo-Light in need of help

[monty]

A friend who knows I like to surround myself with oddball vintage things recently gave me a couple of televisions. One is a Sylvania Halo-light, which I’m thinking might date around ’59. It’s a real sweetie-pie and I would love to see it working again.

Unfortunately, this is about as good as the picture gets, hooked up to a VHS. Pretty much non-existent, with absolutely no waver to the activity whether the tape was on or off. Sound, on the other hand, is great, as is the halo-light.

Any thoughts on where to begin?