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 ZL 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. Maybe some has diode readings in this area I can verify? 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.
I found this in the forum and will be taking diode readings and reporting back very shortly.
Any help getting my wife’s switch up and running would be much appreciated!