Could my new Airport Extreme be causing weird sounds on my TV? I recently got a new Apple Airport Extreme. Since installing it I've had two problems which I think are related, as they didn't happen with the old Airport:

1. My TV set makes a VVVVUT vvvvvvut VVVVVVUT vvvvvvut sound (if only this were "Car Talk"), for about a minute, several times an hour.

2. My WiFi radio is having problems picking up signal. Sometimes it's fine, sometimes it just doesn't connect.

Any suggestions for fixing these problems? My computer skills are limited, but I'm happy to tinker when given good directions. Going back to the old Airport is not an option, as it caught fire.