Shruthi-1: garbage in screen

Hi, my Shruthi-1 worked correctly, but after I change the potentiometers, the LCD behaves like I show in this video: http://www.youtube.com/watch?v=11tJtQ2R1RM
I don’t know if a pushed something else in the process. What could it be?

Looks like a weak solder joint on the connection between the LCD and the main board, causing data corruption of the messages sent by the MCU to the LCD.

Thanks! That was it. Now I have to solve why I can’t hear no sound anymore.