Change all wax capacitors on sight. Remove all valves and clean their bases and pins using proprietary switch cleaner, similarly all switches, pots and connectors. Replace all electrolytics. That's what I'd do before
anything else, because if you do this you will have removed a very large proportion of the faults that
will exist in that TV.
I have an EF80 TV22 in excellent condition that is patiently awaiting (for the past 30 years) restoration and that's what I'll do. Others like to address faults piece meal. I don't see the point of that when the end goal (for me anyway) is to get the set working with as little risk as possible and also wanting to avoid future failures as a result of iffy components giving up the ghost or performing way out of spec.
Best of luck!
