I’ve got a switch that I installed a Picofly in. It was my first time doing this kind of work and I did an acceptable job.
Today I turned this switch on and it wouldn’t boot the mod chip. I took it apart and found that both the ground and 3.3v wires had gone off their solder points on the main board. These points are around the m92 chip.
I spent a little time getting them soldered back down. I had trouble with the 3.3v point and ended up switching from 30 AGW silicon insulated wire to 40 AGW magnet wire. I managed to get this soldered in and wired up.
I was able to get the ground wire in but I bridged the ground side of the cap next to it. I figure this shouldn’t matter though as they both go to ground.
Once things were in place I powered it up and it booted to hekate. I sealed it up and considered it done. But when I plugged it into the dock I got a blinking green light. I tested the dock with a known good switch and it worked fine. I then plugged the problematic switch into an OEM power plugged directly into the wall and did not see a charging icon. I got my USB power tester and it shows 5v 0amps. It looks like it isn’t charging at all.
I went back to the bench and opened it up again. I tested for shorts around the m92 chip and everything seems fine. I also checked the fuse and it took seems fine.
So I’ve got a switch that powers on but won’t charge. Fortunately it has a full battery so I can do some testing.
Any thoughts on where to start?
