High pitch noise on JVC DT-V

[zer0dahero]

I have a DT-V1710CG that makes a high pitch noise accompanied by a slight vibration of the image.

It only happens when the set is cold and there's an input signal. It lasts for 10-15 seconds and it goes away. It really feels like some sort of vibration or "resonance".

I saw someone posting on reddit with a almost identical issue on a different set and he was saying it was the flyback vibrating. The guy solved it by sticking a toothpick somewhere underneath it to stop it from moving.

I'm wondering if anyone has any insight on what the issue could be. Any input is appreciated