Difficulty

Open the door of your humidor and unscrew the display cover. Note the different screw sizes and their corresponding sockets.
Lift up the cover from the bottom to remove the display assembly.
Disconnect the wires from the display board and remove the display assembly.
Push through to release the cover to expose the display PCB.
Push the black tabs to incrementally remove the display PCB.
Remove and replace your display PCB. Insert the new PCB and make sure the chip is closer to the thicker side
Insert the back cover and reconnect the display PCB back into the unit.