[roundscreen]

frenchy.
In a way that is good news. Remove the plate cap on the 6cb5 and see if you get a arc from the tube. Should be about a 1/4 inch long when it jumps to the screw driver. If you do, Put the cap back on the 6cb5 and Pull the cap on the 3a3 and see if you get a arc from the cap that comes out of the fly. That way you can figure the fly is working. Did you check the 6bk4 tube? It could be that is the problem. The caps or resistors in the hv regulator may be bad.
I am not sure what the crt tester would show if a crt is damaged by no focus voltage.
I would guess the crt went to air and the heaters would go out? That will give me something to do when I run into that again.
ED