I have my laptop's headphone jack connected to my LG LCD TV's audio in via a simple 3.5" cable, and there's a buzzing sound coming out of the TV's speakers that seems to change with what's being displayed on the TV. It *seems* related to the brightness, but sometimes a display with many colors will be louder than a display that's predominantly white.
I've tried plugging the TV and the laptop's power into the same power strip, and even unplugging the laptop's power adapter completely, and even changing the TV's brightness/constrast, but they don't make any difference. I've also made sure to mute the microphone volume in Windows (even though there's no mic connected). The headphone port is the only means of getting audio out from the laptop, and external speakers are not an option in my situation.
What can I do to solve this?