Black vertical lines on left side of monitor screen (enduro racer )

[Body pop]

My enduro racer has black vertical lines ,shadow like ,but not stable
Down left side of pic
Would this be a tube issue ? Degauss ?
I’ve tried adjusting the chassis ,the flyback moves it a bit but not much
It’s tough to catch it on camera


Any ideas please .
Thanks in advance

 

[Georgian2]

Does the horizontal width potentiometer work? It looks like the image is to wide and you have fold over. I could be wrong.

 

[Body pop]

Does the horizontal width potentiometer work? It looks like the image is to wide and you have fold over. I could be wrong.

That might be a very good suggestion ,as it’s the only thing I haven’t moved as I wasn’t totally sure which one it was
This is the diagram from back of cab ,so will try
Thanks 👍

 

[Body pop]

Unfortunately that didn’t sort it either

 

[gunblade]

have you replaced c57 yet as that is the most common cause of this sort of issue

 

[Body pop]

have you replaced c57 yet as that is the most common cause of this sort of issue

Thanks for the reply ,I’ll give you a shout about sending it over at some stage,
I’d make it worse if soldering required