Picofly Switch not starting anymore

[MethodMan2025]

Hi guys,
I have installed the Picofly RP2040 mod on my OLED Switch. Everything worked so far. I got the Picofly No SD Card image. I then loaded the necessary files onto my 512 GB Sandisk Ultra MicoSD card and was able to start hekate. I got the slow eMMC mode and could fix that somehow. After that I could create a partition based emuMMC and everything worked finde for one day. The next day I couldn't start the Switch anymore and got only a black screen. The dat0 was before the failure 0,78V and is 0,51V now.

Here my measurements:
Dat0 (C) = 0,51V
CLK (D) =0,47V
A= 0,47V
SP1 = 19,3 Ohm
SP2 = 19,3 Ohm
B = 0,81V

Picofly blinks one time blue and three times yellow.
What could be wrong?

Thank you for taking time to read my post. I look forward to your response.

 

[alecocr20]

I had a similar issue and it was related to D0, the value seemed ok but but after removing, replacing and reflowing the adapter everything started working as expected. Now I moved to the kamikaze method since long term reviews of the adaptor is always bad

 

[M7L7NK7]

Tical

 

[MethodMan2025]

I had a similar issue and it was related to D0, the value seemed ok but but after removing, replacing and reflowing the adapter everything started working as expected. Now I moved to the kamikaze method since long term reviews of the adaptor is always bad

Thanks alecocr20 for your answer. I thought about the dat0 adapter too, but I can't start the Switch even without the picofly board. It seems completely dead, is it normal that it won't boot without Picofly in the stock firmware?

 

[jkyoho]

Thanks alecocr20 for your answer. I thought about the dat0 adapter too, but I can't start the Switch even without the picofly board. It seems completely dead, is it normal that it won't boot without Picofly in the stock firmware?

did you remove dat0 adapter as well? It is NOT normal when you cant boot to stock with or without any mod

 

[MethodMan2025]

@jkyoho yes I removed the dat0 adapter and other flex cables from picofly, but it does not want to boot if I press the power button. I think it is a hardware failure. I checked the caps in different areas around the ICs, but couldn't find an obvious short.
It is stuck at 15V and 0.48A. If I connect the Switch to my PC, it is detected in the TegraRCM gui App as "RCM device detected" and in green "RCM O.K"

Does this mean that the APU is OK? Would a reflow of the eMMC solve this problem?

Is there a circuit diagram for the OLED switch or a table with values for certain areas?

 

[MethodMan2025]

I had a similar issue and it was related to D0, the value seemed ok but but after removing, replacing and reflowing the adapter everything started working as expected. Now I moved to the kamikaze method since long term reviews of the adaptor is always bad

Thanks all, I have completely removed the Picofly mod and reflowed the eMMC- everything seems to working fine again.

 

[zumbito]

Hi, I am having the same issue. What do you mean by reflowing the eMMC?

 

[MethodMan2025]

@zumbito This isn't a Nintendo Switch in the video, but the process is nearly the same. The video is for demonstration purposes only. You need equipment for this, so if you don't have it, it's better to leave it alone. Youtube Link