Sometimes they just blow for no reason BUT.....
Since it was changed before you need to run the set on reduced
voltage to trouble shoot. I put the process out last week
http://videokarma.org/showthread.php?t=270707
If its NOT a remote start at 60V & slowly turn up.
You can run it a few seconds then feel the horz out. If its hot
you probably got a bad flyback.
73 Zeno
LFOD !