How can I disable the keypad of this 32 "Noblex Led TV? Sometimes only the maximum volume is fired. Repairing the board is very expensive and since the remote control works well. The idea is to handle it only with control. I am currently using it with PC speakers connected to the audio output (cancel the volume to the maximum of the TV) Attached technical manual of the TV ... I disarmed the device, but my knowledge of electronics is garden / preschool level ... https://drive.google.com/open?id=1Q_PHSvfSgjz0QNnV9DPENDeR-JAJ2uB1