I recently did my first Picofly installation in a new Switch OLED. The modchip is working flawlessly, but since the installation the left joy con is not detected any more by the Switch when attached. I can only connect in wirelessly. The joy con is still being charged when attached though. There is no animation of the joy con being connected displayed. Everything was working previous to the installation of the modchip. The issue happens both in OFW and CFW. The fan works without issues.
I already checked a known working joycon, continuity to the connector and the resistors next to the connector and compared the resistance readings to schematics I found online. I also checked two sides of the APU as shown in the posts without any damage (I had read of some people with a similar issue but with the right joy con, who damaged traces below the APU shield). There is a small damaged area below the shield next to the CLK point, but it does not seem to affect any traces. I did not remove the shield on one side of the APU where the flex cable of the picofly can hold on to.
I am currently out of ideas. I would be really grateful for any tips or advice on how to further debug the issue. I can’t use the Switch in handheld mode at the moment because of this issue.
Attached are photos of the board and close ups of the area around the connector and APU including the small damage around the CLK point I mentioned earlier.
Congrats on the OLED mod as its the hardest of the 3 NSW mods to do. I would disconnect the ribbon and clean it with IPA and do the same to the FPC connector. Maybe there is flux on there or something that is prevent it from making a good connection. Then inspect the ribbon cable to damage\tears. I have seen bad ribbon cables that came from putting in the board as it can be a bit tricky to get the board with that ribbon in the way. If all looks fine I would inspect the rail that connects to the joycon and or order a replacement rail one on ali or amazon to test. Once its all working I would personally reroute that D point wire away from the screw hole that you use for the APU heat pipe and shorten all of your wires.
Thanks a lot. To be honest, when starting out I expected things to go wrong with the modchip itself, so I was very surprised when I saw the modchip working at the end and something else being broken.
I tried cleaning the FPC connector and the ribbon cable multiple times. I also already bought a new rail from AliExpress and tried it to to avail. Thanks a lot for the advice still.
I just recently might have found the issue though.
The circled resistor does not always show 100 Ohm. Sometimes I don’t get a reading at all. I thought that maybe it needed some more solder on the right side, but these 0201 resistors are just so incredibly tiny that I unfortunately messed up while trying that and dislocated one of the inductors (I think 3nH? I hope it’s correct, I saw it on one schematic I found online) causing a short.
Unfortunately the area looks like this at the moment:
I decided to buy micro tweezers to be able to hold the resistor and the inductor while working on them with an iron, but because of their small size it’s going to be tough to replace them. I’m still waiting on their arrival right now and will follow up afterwards. Because I don’t have a hot air station I will try heating up both ends of the components repeatedly and try to reposition them.
