Just wanted to follow up and say that I did not continue to look for a fix for this unit. Upon further inspection I noticed that some plastic hold downs in the case were so worn they were no longer holding the circuit board, and thus the LCD and buttons, in place. Even if I fixed it, it would still not be 100% so I deemed it not worth the effort. I got an EX330 and EX430 both at very reasonable prices. Really like the 430 actually. It was only $3 more than the 330 and is TRMS.