Why does the image flicker or shake?
This flickering is usually caused by one of the following: The refresh rate (measured in vertical Hertz) is set too low. Solution: Try setting this refresh rate to at least 72 Hz. (Do this through the video card setup, not on the monitor.) Flicker or shaking may be caused by another electronic or motorized device, either placed too close to the monitor or plugged into the same electric circuit. (on the same circuit breaker). Solution: Try moving the offending device further away from the monitor, or try turning off all appliances or devices on the same circuit breaker.
