Nintendo Switch V2 Picofly - "short short long" (**=) error

[exerciser4585]

Hi,

For context, I successfully modded 2 switches until now (softmod unpatched V1 et picofly on patched V1).
Recently, I put my hands on a V2 and soldered a Picofly clone on it (New 2040 Plus, same model as the patched V1).

The switch worked fine for like 1 week and after some games installations and a reboot, it didn't boot anymore.
Now, I have a blue light followed by a lovely "short short long" code (**=) which stands for "No eMMC block 1 read (should not happen)" (But, meh... it happened).
When I try to boot it up, hekate doesn't boot and when I remove the SD card, I don't have the "No SD Card" screen anymore, which means that the switch doesn't manage to glitch.

So I resoldered the chip, retested connections but same error.
I tested with a Working eMMC from the previous patched V1 Switch with the same chip and it managed to boot and show the "No SD Card" screen.
Sooo I think that my eMMC is faulty.

What I want to know is : What can I do to save this eMMC ? (I have a backup with BOOT0, BOOT1 and RAWNAND).
I heard that once restored to a donor eMMC, we can't play online anymore with the Stock SysMMC and I wanted to avoid that. So, is it possible to save it by reflowing the eMMC chip or reballing it ?
Is this error code fixable by reflowing or other method while keeping the possibility of playing online ?

Thank you for your help !

Post automatically merged: Jan 23, 2025

UPDATE: After switching the eMMC with a new one. I managed to have a new error code: "short long short" (*=*) (No eMMC block 0 read (eMMC init failure?))
So maybe my solder points are bad or could it be a bad mosfet ?

 

[deeps]

your chip is probably bad. it's not mosfet related. the mosfet is not yet involved when these errors are triggered

 

[exerciser4585]

Thank you for your reply !

Ok so I may order an Instinct-NX or hwfly instead ?

 

[exerciser4585]

UPDATE: I ordered a new chip (PicoflyCore), installed it with the new flex cable and it worked !
So if anyone is having a **= or *=* error code, it can be a faulty chip (Maybe some capacitors have been blown by a short, idk)

 

[Ketnak]

I'm having the same issue. After modchip install, my switch worked just long enough to backup eMMC using Hekate. Now, it gets stuck at black screen after nintendo logo. Anyway, where did you order the new chip from (can't trust random aliexpress chips anymore i guess)?

 

[exerciser4585]

Yeah mine stopped working after a random reboot. I was thinking, maybe I didn’t unplugged the battery without thinking while I was soldering and it caused a short somewhere.
I ordered 3 chips from different sellers, all from AliExpress and the first one I installed booted perfectly and continue to work after nearly two weeks

 

[Ketnak]

Just ordered a new chip from another seller, hopefully this one won't be faulty.

 

[exerciser4585]

Hope that it will fix your problem.
At 7€ /chip, I ordered 3.
Remaining chips will go in family/friend’s switches

 

[Ketnak]

UPDATE: Everything works as intended, so indeed that chip was faulty.