Recapped the Avanti and....

[zeno]

The 2 400mfd caps are in the 125 scorce. Take a cap 100-200mfd
200V or more & hang it in parallel with the 400mfd section with
clip leads. Turn set on & see if it cures it. Do the same with
the other 400mfd.
The 500 is in the 24V. Do the same thing but BE SURE
you discharge the subbing cap first.

One other thing is lead dress be sure nothing like the yoke
wires are near the CRT harness.

Also looks like there is still an old 22-5001 cap on the flyback
board, change it !

73 Zeno