Copy the lcd.bin file to the micro SD card and put into printer while powered off
Move the x-axis (x-carriage) all the way to the left making sure the endstop stays pressed in.
Slide the y-axis (bed) all the way to the back making sure the endstop stays pressed in.
Press and hold down the control dial/button
While keeping the control dial/button pressed down, power on the printer. Keep the control dial/button pressed down until the fan on the hotend starts spinning (about 3-5 seconds).
The LCD will stay black until the update process is finished which is about one minute or less. The LCD will turn on when the update is complete.
Delete lcd.bin from micro SD card if printer keeps restarting.
Update not starting? Fan doesn't start spinning?
If the fan doesn't come on, check to make sure the x and y endstops are pressed in.
Verify the USB cable is disconnected from the printer
Try updating the motion controller firmware first. Older firmware version had problem updating the UI controller firmware.