Tektronix 434 s/n below 500000 faulty ps.

[johnmcgivern]

Hi wee bit of luck been checking transistors as quite a lot are socketed.
Applied signal from generator and triggering stable apart from vertical green line from top to bottom and a horizontal faded line scrolling in Y direction bottom to top.
See photo.
When rotating intensity knob voltage varies from 8vdc to 89vdc.
Intensity too bright cannot reduce???
Any ideas.
Cheers, John.