DGS resistor will get very hot.
Odds are its going into HV shutdown.
Unplug the DGS, run on variac at abt 95 VAC.
Put an AC amp meter in the line & dont let it go above 1 amp.
Try set & see if it runs. More after you do that.
BTW the set was built by Gold Star or Samsung, dont remember which.
73 Zeno
LFOD !