I just did the black light LCD mod and after putting the transmitter back together, I seem to have a stuck trim (right hand side).
When I switch on the transmitter, the 3DR logo appears, then the 'boot' beep happens, then the trim beep starts. It starts slowly then speeds up. If I press the UP button, the beeping ceases momentarily, then the LCD shows the trim gauge working up to the middle, then it shoots back down again and the beeping recommences.
I've taken the switch board out to make sure it's got nothing jammed under it, and it didn't.
I know I've caused the problem. It was working fine before I did the mod. What I am hoping to find out is if there's a way I can either disable the trim, or fix it properly.
Here's a video of the problem: https://dl.dropboxusercontent.com/u/884995/2015-08-21%2013.04.40.mp4
Thank you for any help, info, advice.