So I got a low serial, MAYBE unpatched switch that didn’t charge or turn on and quickly realised the USB port had a few bent pins at the sides.
I replaced the USB port and still no life, found a few shorted caps around the M92T36 so replaced that, shorts were gone.
I did manage to knock the 0201 10nf cap off that sits between 5v and GND near the M92 chip but I see online that’s not going to stop the thing charging.
Plugged in a Samsung charger as I don’t have the official one and it started to charge, very slowly.
Then I unplugged, put it all back together and then it wouldn’t charge again.
Took it all apart, inspected my work, gave it all a reflow for good measure, cleaned it up, charging again worked so I put it back together again, testing as I went and fully back together, charging still worked so I left it for an hour or so, still on one bar but still charging.
I unplugged it to move to a different room and plugged it back in, now it won’t charge again!
It charged enough that you can turn it on and you get the Nintendo logo then the battery symbol but no lightning icon to indicate charging and it turns off again.
I’m a bit lost really. I tried the USB C both ways, same thing. There was no shorts around PI3USB and the filters were fine. Could it be the BQ chip? It’s just really odd how it’ll work one minute and not the next. I’m confident in my soldering, the port did work fine until I unplugged and replugged?
Tearing my hair out (and I don’t have enough to lose!) Anyone had a similar issue before or know where I should start looking?