The trouble makers are the hoz output. Its called a gate controlled switch.
They are marked SG-### and are on a heat sink on the HV board.
It takes nothing to blow one & some other parts. Finding the actual
cause is sometimes imposable. When I was at Sony service they would
often change the whole HV board to get one right. That was the mid 70's
and almost nobody would touch one. Those that did charged $125 + parts
sometimes the bill went over $200, a lot back then. My 76 Coupe DeVille
was only about $8000 new IIRC ! And that was a REAL Caddy
On your 2SC1127 you should be OK BUT on older sets you did have to use
the OEM or the color didnt look right. They even had a bulletin on it.
Cross that bridge if you come to it.
73 Zeno
LFOD !