Back in the 90's I did contract work for the cat that bough out all
the Advent parts & service stuff. It put him into a $1,000,000 house
in a rich Boston suburb.
All the chassis I saw were either Sylvania or Electrohomes. I think
there may have been one more. They were modified console chassis
so easy to fix. Most of the failures were CRT's. You will need the
OEM screen that is curved. Otherwise it doesnt register right.
BTW all the stuff is gone now & his shop closed.
73 Zeno
LFOD !