Back and menu button not working
I have recently replaced the LCD and the charging - sub buttons combo module on my SAMSUNG SM-A500F (A5 2015). After that my back and menu button are not responding. The LED light of the buttons is turned on, but there is not response when I press them.
Should there be something on the LCD part, under the buttons, that is probably not there. Right now, the LCD I have bought had nothing. I could clearly see the symbols of the buttons when I look from under the screen.
this the back of my screen