My devo12 is buzzing...

I can hear a buzzing noise inside my devo12. It also changes pitch and intensity when redrawing a screen. The voltage indicator drops a lot when touching the screen.

The voltage indicator drops on my devo12 too, but no buzzing.

It's very faint. You have to put your ear pretty close to it. It sounds like ticking, then if you press the screen you can hear a buzz.
Be careful, don't put your ear up to it when the alarm goes off! It hurts!

--edit--
My 8s does it a little bit to... I may be loosing it. Too many hours playing with my TX's