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A K are the common backlite power connectors A is the Anode so positive, K the cathode so GND. They are located when looking inside the box from the rear of the LCD (connectors side) on the top left, connected by two loose female jumpers. The top female jumper is A, the bottom K. LCD schematics are ...

Found a solution: I also had a very dark (yet still working) LCD on my MOTU Ultralite. So I checked the voltage of all inputs to the lcd ... Then I ended up noting that the AK voltage was only 3.3 volts. To augment the intensity I used the pin 1 of the 14-pin connector on the other side to feed the ...