Newbie here, Crashed my phantom 2 vision + in water.  Everything seems to work but the up and down control for the gimbal.  I have the controller with the thumb wheel and that doesn't work, and the up and down from the control app on an Android phone does not work. Gimbal self levels and records.  I have tried connecting it to my computer for calibration and that did not help.  Can somebody please tell me if there is a way to diagnose the gimbal problem I am having or is the gimbal broken and in need of replacement?

i presume you thoroughly dried out the phantom etc.....
you can try the attached but it is a calibration procedure and nothing else...
follow directions carefully and redo if needed,
Check all cables at the base of the gimbal, there are three of them and can be finicky, makle sure they are fully seated
please report back....