The first time i used my smart controller i also only saw a blank screen. If i looked really closely i could see some icons in the screen.
It turned out to be a contrast problem, adjusting the pot on the front fixed it for me.
On other models where there is no potentiometer you can solder one on with a resistor.
It turned out to be a contrast problem, adjusting the pot on the front fixed it for me.
On other models where there is no potentiometer you can solder one on with a resistor.