So, I have been working on another switch that among other things had a bad USB port with ripped traces. After fixed everything, the switch happily booted up and was able to charge both ways. But on initial testing with my dock I would get a back screen.
I took it apart again and checked for continuity from the port which was all good, so I gave it a good clean with IPA and a brush and tried it again while the console was open. With just the battery connected and nothing else I got an image on the dock! So I put it all back together… and black screen again. I tried a few more times putting it in and out and then when removing it the greenlight stayed on. After unplugging the dock, now it doesn’t respond to a switch being inserted at all, and doesn’t provide charge either.
So, this leave me with two questions:
- What is likely to have died within the dock?
- What is the likely cause on the switch end?
For 1 I would guess the M92T17, as its the chip I often see people mention.
and for 2 I would guess a bridge somewhere on the USB port. But if anyone has any insights before I get started it’s much appreciated!