Hacking [OLED] Picofly RP2-82 RST/B issue (**) - Alternate B point?? changes error to D0 (=*)

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DonP

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Im installing the picofly rp2040 on my nintendo switch oled, and encountered some issues. Ill provide images and diode mode readings before I fully explain my issue.


IMAGES :

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Diode mode readings:
3v3 = .379
D = .412
A = .428
C = .690
B = .378
Gnd = 0
CPU = .252

You might notice I have my RST line soldered in a weird spot.. I made some sort of mistake earlier in the process and fried out the original B pad? At least I think thats what happened. I'm not sure why that pad behaved different from any of the other ones ive been using- like the other B pad ive been soldering to and desoldering a few times now.

Originally, I was using the normal B pad -

** error, boot to OFW.

Then I reflowed the B joint on the picofly chip, HOORAY - I booted successfully into the No SD card screen. Then all of a sudden after a few more minutes of fiddling and putting the console back together like slightly more than it was just so it wouldnt spill its guts upon being tilted - Same ** error appeared.

I reflowed the joint again- this time it crapped out though and stopped taking solder. Maybe I ripped it at some point with something- again not sure exactly what caused it to break that was just a total skill issue on my end.

I then moved the wire and connected it instead to the B pad near the top of the chip, I ASSUMED it was just an alternate spot, since they are in continuity and share the same readings- and they might be totally fine.

Now with this current setup, I get the readings listed, and now the chip gives me the error =*. Indicating no dat0. Im aware that the dat0 adapters can be spotty, but considering I just booted successfully minutes ago, and I am now soldering the B to a new place that I haven't confirmed fully whether or not its totally chill to place it there- It could totally be the chip freaking out about that and giving a dat0 error in its place??? Theres not much of an easy way for me to know considering I'm not recieving any spotty readings - the .690 on C IS weird right now I think right? - other than getting another chip and just seeing if it works, or doing kamikaze. I mean ideally - both of these. Im mainly posting to see if anything is obviously wrong with the additional B pad that im trying to use because theres probably something obviously wrong with it thatll make me feel a bit dumb then hooray its fixed. I plan to troubleshoot more tomorrow though.

It could easily be that the successful boot I had into the No SD card found was an insane stroke of luck, and the dat0 adapter decided to hate me forever or something. Right now my finger is primarily pointed at the B pad because I was dealing with that error originally before the pad gave out.

Im pretty glad that It does boot into OFW consistently still - Its gotta be a scary time dealing with a bricked switch lol thankfully this is not that- YET haha
 

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