The very valuable work by Chris consisted in modifying the 2010 version of the LiquidCrystal library distributed with the Arduino IDE (it was not supporting the shift register at all) and thanks to ...

For example an spi display or TV-out (using the TV-out library, probably on a second arduino). Reason for me to ask, I’ve got a Yamaha PSR-S500 with defective display, new displays are around ...

Ensure that the backpack pins are straight and fit in the LCD module, then solder in the first pin while keeping the backpack in the same plane with the LCD. Once you have finished the soldering work ...