Keyboard with Protective Case for Samsung Tab A7 10.4 2020

Question from Sergei of Russia: There is a problem with your wireless keyboard. When turned on, the wireless network indicators do not light up. Also the devices do not detect the keyboard. When the power is connected, the power indicator lights up. Model: Keyboard with Protective Case for Samsung Tab A7 10.4 2020 Can you suggest what could be the problem? | Answer: please refer to this video: https://youtu.be/wdPu-VRSj8A