Hi all,
I picked up a broken Switch Lite from the side of a road. The unit was missing a digitizer and LCD and had a broken joycon daughterboard amongst other damage, so I bought all those parts to see if I could fix the unit. The motherboard appears to be in almost perfect condition, with no traces of water or physical component damage, which is the main reason why I thought I could give it a try.
However, the display doesn’t turn on when I try to turn it on with the power flex cable. The fan doesn’t spin either, but I can feel the CPU area getting warm/hot. Occasionally, the blue LED under the home button lights up. The battery doesn’t seem to properly charge through the USB-C connection, but I can charge it by directly connecting the battery to a bench power supply. When charging through the USB-C port, it draws 60-70 mA @ 15 V.
Any idea where to start or find diagrams/reference voltages? I tried checking the MT and BQ chips for shorts. I didn’t find any, except for the gray component circled in red, but I’m not sure what that’s indicative of.
https://www.tronicsfixforum.com/uploads/db3735/original/2X/c/c8cd3fd3a43c0d63d274c66c5f7ad679928e4a3d.png
I’m having trouble uploading images/links, but I can try to provide more pictures if needed.
Thanks in advance!