I have a Optiquest v73 that flickers. It's not the refresh rate, because it is persistent even at +100MHz. I think that it is a power problem. The outlet I have it plugged into shares the same breaker as my fridge and microwave. When I turn on the microwave, the flickering gets much worse. So I think that it is a inconsistent power or insufficient power issue. Instead of using a cheap power bar should I buy a surge protector to fix this? Or will I have to buy a much more expensive UPS? Or is there a third alternative?