Sanyo 27" CRT TV speakers have intermittent static noise during operation

[CRTguy]

I have a 27" Sanyo CRT TV from the year 2000 and during operation, the TV speakers produce static noise that is intermittent. It does this whether I have a video source connected or not. The static noise mostly goes away during darker scenes in a video but if the picture gets bright or there is a lot of white text on the screen the static noise comes back and is much louder. I used to own the same exact Sanyo model a few years ago and that TV also had the static noise problem.

Does anyone have any idea what could be causing this and if it can be fixed? I know I could just disconnect the TV speakers internally but the TV has nice sound and I would like to fix it if I could.