High pitched... uh, squeel or whine or something from monitor

[crashwg]

I've got a 17" PC monitor, decased, in my Mini-Galaga and it's making a horrible noise.

What I know:
Monitor purchase between 1 and 2 years ago. 
Been stored, screen down most of that time due to being decased.
Was installed in current position for 24 hrs+ before turning on.
Two video sources have been used resulting in the same sounds.
Boards (driver, video or whatever it is they are called) are hung from the grounding strap that wraps around the tube by a wire. This I would like to fix when I figure out how...
The pitch and intensity of the sound vary with screen resolution.
Sound even goes away for periods of time with resolutions ≤1024x768 but will come back.

I think that's about all the knowledge I can bring to the table... 

Any fixes for this headache-inducing sound that a layman can do?

[grantspain]

so you get a good picture on screen but you have this frequency noise yes?

[crashwg]

so you get a good picture on screen but you have this frequency noise yes?

Precisely.  Image is good in all resolutions tried.

[grantspain]

it may be just a noisy coil,try tapping the chassis near where the noise originates-if  the noise lessens then apply some glue type substance to the offending component-this is a common problem on cheap monitors/televisions

[northerngames]

or try dimming the brightness and color a little I know some make weird noise's if there cranked up to high.

[ChadTower]

Could mean he can now hear what was always inside the shielding he removed.  They're all louder when you decase... some are just louder than others.

And, uh, don't hang your boards from the grounding strap.  Bad.  Boards need to be secured.