Copy the lcd.bin file to the micro SD card and put into printer while powered off
Slide the x carriage all the way to the end stop making sure the endstop stays depressed.
Slide the bed all the way to the end stop making sure the endstop stays depressed.
Press and hold the dial in.
While keeping the dial button depressed, power on the printer. Keep the dial depressed until the cooling fan on the hotend turns on and then release the dial.
The LCD will stay black until the update process is finished which is about one minute or less.
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 end stops are depressed.
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.