ok my opinion is this if you are good at soldering then have ago.
but change all the wax caps and reform the main electrolitic if poss but it will probrably be in poor condition anyway this set isnt the best starter because thing are tight to get at. also have you got an isolating tranceformer if not do not atempt tv repairs without one.
i dont know how much you know about electronic components but you had better read some books on the
subject first.
do not turn the tv on for the above reasons.
the set will only gain in value if kept in good condition.