Hello,

I have a Nintendo switch lite I changed the joysticks on. The new joysticks and backlight we're working after putting it back together, but the LZ button wasn't. I took it back apart, verified everything looked good and put it back together and now there is no backlight.

I checked the connector pins and the backlight ribbon cable on the daughter board and they look perfect. I tried another left daughter board and still no backlight. I bought a new ribbon cable that connects the daughter board to the main PCB and still nothing. I even looked at those connectors under a scope and see no issue. If I shine a light on the screen I can see it and I hear sounds, but the screen is just not lighting up.

I checked the caps for shorts around the backlight BGA chip on the main PCB and see no shorts and diodes check good. I'm at a loss at what could be causing the issue. I wonder if the backlight BGA is bad even though it shows no shorts around it.

Any help getting my wife's switch up and running would be much appreciated!

Thanks!