As someone who has repaired many a b&w tv the first thing I suspect is the high voltage(about 20kv @1ma).If you touch it you will live(unless you have a pacemaker

)Its like getting shocked with a sparkplug wire.I know a way to check th high voltage with a screwdriver but I'm wary of telling you how in case something happens to you. These tv get dust inside and it doesn't take much to overload the H.V. You could try cleaning around the H.V.(its the part of the tv with all the dust around it.The high voltage attracts dust like an electrostatic air cleaner.If the horizontal flyback transformer is gone(part of h.v.)then its a lost cause.Be careful as some chassis were conected directly to one side of the a/c line so depending on which way the plug is in the wall the chassis may be live or not.The value of doing this is not n the tv but in the learning experience of trouble shooting.Good luck and be careful