Does Anyone design PC's for Plasma Monitors?

I have a Panasonic plasma monitor that emits noise. I'm curious if a PC that is designed to eliminate RFI and EMI would help reduce the noise and improve the picture . Do any of the PC companies design a cable for video applications?
Its not fan noise,its a high pitched buzzing sound,They recommended using their PC because it has an RFI module on it. The noise may never go away but I was wondering if it would improve. Almost sounds like transformer noise.
You can get some PC monitor cables with RF blockers on them. I beleive they just use ferite.