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My treadmill has a 3 hp motor. When I run it, the TV out on my PC has a disturbance. Noise in power supply?

It is a 3 hp motor on the treadmill. The motor is running the treadmill, which I use to exercise. I have a degree in electrical engineering; so feel free to include lots of technical detail. When I disconnect the PC (laptop)'s power supply and run the laptop on battery, the disturbance is hardly visible.

Public Comments

1. Many motors create harmonics and reflect them to the grid. Most of these harmonics get nullified over distance but the closer you are to the source of the harmonics the stronger they are.
2. unplug some stuff that happens when i plug to much stuff in and u said its less of a disturbance when you unplug the laptop unplug some other thingd or get a surge protecter thats what i did now i can run my ac my laptop the light the celing fan and anything else i want with no side effects to me accept the high electric bill which isnt my problem its my sisters
3. You are mixing a high-current motor on the same leg of the AC power line where you have digital and analog electronics. The motor from the treadmill is injecting noise into the AC power wires and the little 'power-brick' for your laptop was not designed to filter out that much noise. You need something like one of those expensive Monster noise-filtering power strips on the laptop power cord to solve this. But try plugging the treadmill into another AC outlet on the other side of the room to see if this solves the problem.