If it's a 9-92 still in there, that's the PROBLEM! That board was discontinued in the early 80s due to trouble. The update is a 9-147. Don't even fool with a 9-92... And I second kc8adu's comment on the fuse. It must be correct, and also another note is that if that fuse is open, the screen will stay black like a high voltage loss. That confused alot of techs early on
And one more comment: That is probably the best 19" TV ever built. That has the 19VDZP22 HyperFocus tube in it. Black matrix and very nice phosphors.
Charles