Looking for help in solving the d0 error

[zabbiman]

Hey, everyone! Maybe someone could help me figure out the problem with my Oled. So, yesterday I finally installed picofly with a d0 adapter. However, I get a =* d0 error, and my switch just loads into the original OS. I followed all the instructions and rechecked everything I could - no luck. I tried replacing the d0 adapter and wires - still no luck. Here are the diode readings (taken from the picofly chip):

A - 0.644
B - 1.387
C - 0.651
D - 0.524
GND - 0
3.3v - 0.840

Sp1 and Sp2 = 0.27 ohms

I'd truly appreciate any input. Will try to share some photos as well.

 

[GoodFellas]

Please use the Kamikaze method.

 

[zabbiman]

I'm sure it's much better. But since I'm a newbie in this, I feel it's much safer for me to begin with the adapter.

 

[iiTzSamurai]

I'm sure it's much better. But since I'm a newbie in this, I feel it's much safer for me to begin with the adapter.

did you flash the firmware to the modchip?
https://github.com/Ansem-SoD/Picofly/tree/main/Firmwares

[TABLE=full]
[TR]
[TH]Point[/TH]
[TH]Diode Value[/TH]
[/TR]
[TR]
[TD]A, C, D[/TD]
[TD]~ 0.5-0.8[/TD]
[/TR]
[TR]
[TD]3.3V[/TD]
[TD]~ 0.6-0.9[/TD]
[/TR]
[TR]
[TD]B[/TD]
[TD]no reading or > 1.2[/TD]
[/TR]
[TR]
[TD]With B, if you reverse the probes it should read around 0.4[/TD]
[TD][/TD]
[/TR]
[/TABLE]
If you get 0.0 on any point (other than ground) you have a short. Do not move forward until you find and correct the source of the short. If you get no reading (Except point B, that is normal) then you have not made a solid connection to the board.

 

[LunarVeil]

Did you flash the payload correctly onto the RP2040 chip? Sometimes a bad flash can cause the system to boot into the original OS instead of triggering the mod.

 

[Hayato213]

The recommendation is to do Kamikaze if you have a 4 point anchor dat0, and there is issue.

 

[thesjaakspoiler]

Did you properly expose the copper of the emaille wires?
It looks as if they are floating inside the solder :

Same for the DAT0 connection.
If only the tip of the wire is connected, this might cause some noise.
The multimeter diode mode is a very crude way of measuring the connection.

Using a DAT0 adapter should not be a problem at first.
Usually it becomes a problem later.

 

[zabbiman]

@thesjaakspoiler It looks weird, yes, but the connection was there. In any case, I resoldered it and the issue is still there.
BUT, There is an update - I went away and did kamikaze mod. I soldered the other end straight to the C point of the Picofly chip, and I still get the same D0 connection error. I'm seriously confused. Is the chip damaged then? It is recognized through USB though. Just flashed it to 2.80. I'm really confused now.