How to fix this scope?

[Flyback]

Hi,
The below is a video of what two of our scopes are doing...

https://drive.google.com/file/d/1G63XIvb5T2IrLjQpszB3dLRxDxKeN9o4/view?usp=sharing

its 480kb so i though to upload a drive link.

They especially do it when turned on first thing monday after they have been in the damp factory over the weekend......after a few hours of being left on....you turn them off, then on again, and they are "cured".

What is the problem? How can we fix it?

 

[danadak]

Sound like a loose or dirty internal connector or buss connector problem.

I would remove cabinet, pull out cards, clean edge connectors with alcohol or
contact cleaner, and reseat for starters.

Any dip packages in sockets, carefully pry up a little each end and reseat by pushing
down on them back into socket. You don't have to pull all the way out, like just 1/8" movement.
That helps wipe the contacts again.

Regards, Dana.