If it's locking up then it's either your gimbal PCB or your Core Board. Core boards dont do well after being submerged.
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thanx so much for the quick reply, ok at least its narrowed down to 2 things, pcb sounds reasonable, that core board scares the hell out of me,,,,haha, it looked ok on the top side i seen with the top of the bird off. but i never looked under it,,,,,yikes,,,,, scary,,,haha, the camera came on 2 times out of 5 a few min ago, much better than it was a few months ago last time i flew, the lock up seems to happen when using litchi,,,, i started dji app and it had a compass error but camera came on so i took a few photos and she worked ok, then started litchi and went to shoot a pic and screen went black,,,,and camera symbol was left spinning,,,,, its dark here so ill take her for a flight and calibrte the compass tommrow, thanx again for quick reply and all the photos