Verticle Line issues. (half collapse?)

[griffinmaloe]

Multiple issues with my stuff tonight. Here's something I'm sure some of you would know more about. I was messing with one of my tvs that has worked fine for a while. The verticle line adjustment has always been tricky and not perfect but worked. Suddenly the bottom of my screen was black and the parts of my image with flipped and overlayed on one another.

If I try to adjust the verticle line I can either have this, or a white line (like a collapse) but the image is still there but just mirrored top on the bottom with the white line in the center.

Could something in adjustment in verticle line knob be out of whack or is this just the beginning of a verticle line collapse and I need to replace the IC chip?

Here's basically the only two options PXL_20201208_074051560.jpg

PXL_20201208_074043897.jpg

Any personal experience would be great! Just getting into this world of actually fixing some of my tvs and information is hard to find.

[Jon1967us]

Looks like bad caps or open resistor in the vertical section.
Have you checked your voltages and resistances in that area?

[Notimetolooz]

The vertical control might be bad or at least dirty.
Don't allow it to run very long if there is just a horizontal line, the CRT (picture tube) can be irreparably damaged (burned). New CRT haven't been made in decades.

[Penthode]

By vertical line I think you mean Vertical Linearity.

There are two controls which must be adjusted in coordination: Vertical Height and Vertical Linearity. The Vertical Height control mostly stretches and compresses the top of ther image and the Vertical Linearity control the bottom. If the picture has black at the bottom and the foldover you describe, it is a capacitor issue.

The most likely culprit is the electrolytic capacitor in the cathode circuit of the Vertical Output tube which generally goes open. The paper dielectric capacitors tend to leak DC. These are supposed to block the DC and they too need to be replaced.