The only way I think it will help is to reduce the amount of noise injected in the the house AC line by the switching power supply.
If you feel up to it, you can track down ALL electrical appliances that use switchers: Cable/Satellite converters, DVD players, video game consoles, desktop computers, laptop computers, cell phone chargers, etc and install power isolation/conditioning.
This is not to improve the operation of the device plugged into the conditioner, but to reduce the noise your system will pick up.