I wouldn't rule it out, but, would be pretty surprised since most viruses are targetted for specific weaknesses in operating software and apps.

I can't imagine many virus writers that would have thought to design something that seeks out the chips and firmwares etc within M's kit.

A different point perhaps worth considering is the various forms of noise and interference that you will get with a pc sat next to your gear.

My is very noisy with it's fans bussing etc, plus, they apparantly chuck out loads of noise back into the mains. Who knows, you may get forms of noise going through you connection also.

If you've never noticed a difference with the pc on or off, then don't worry. However, you might want to check it out.

Rgds,
Nick