[nom]

joining in on the OT discussion:

You can try to fix high frequency coil vibrations by dousing the responsible component in hot glue or something comparable (the denser the material, the better).

Identifying the part is pretty easy: use a good microphone, put it in a paper tube to make it more directional and move it around the mainboard while observing the spectrum with the audio software of your choice.

I fixed my CRT this way, a looong time ago. I strapped it down with cable ties too, IIRC. Worked like a charm.