LSD/SD card + blue/white backlight LCD are not functioning:
Brand new out of the box, just mounted.
I rechecked all connections on main board and so (qualities of the weldings on boards, integrity of the cable… everything look fine), unbuilt-rebuilt twice…
The power is coming, the red lights of the endstops are on but the LCD doesn’t light up!..
Can’t spot the problem, anyone, any clues?