IIRC the CRT TV's only used a 9-153 WITHOUT any -##
at the end. There may still be a little tag on the old
board. You should be OK fixing the old one. For hoz
out the part # is 121-831 subs to 921-500. The
only thing I worry about is the amount of damage,
never seen that so maybe something else started it
like the FBT.
73 Zeno
