Hacking OLED with HWfly v4/v5 won't boot

[redmagejosh]

Hi guys, I have an OLED switch that now has decided not to boot.
It is running on of the HWfly from the last batch before the RP2040 took over the scene. And also has latest hwfly-nx.
It worked fine las sunday but today it is stuck with this behavior, see video below

This had happened once before, I opened the switch that time and checked but everything was connected and in place. I tried to boot after that and it worked so I dismissed it as bad luck to glitch but it is happening again today.

Any help would be appreciated.

 

[Hayato213]

Do you know if you have a V4 or a V5?

 

[boagamer]

Hi guys, I have an OLED switch that now has decided not to boot.
It is running on of the HWfly from the last batch before the RP2040 took over the scene. And also has latest hwfly-nx.
It worked fine las sunday but today it is stuck with this behavior, see video below
View attachment 419912
This had happened once before, I opened the switch that time and checked but everything was connected and in place. I tried to boot after that and it worked so I dismissed it as bad luck to glitch but it is happening again today.

Any help would be appreciated.

I'm 99% sure the cpu capacitor is not soldered properly.

 

[Hassal]

I'm 99% sure the cpu capacitor is not soldered properly.

Your 99% is wrong cause this issue is related to D0. I've seen this so many times to know its the usual culprit.

 

[redmagejosh]

Do you know if you have a V4 or a V5?

It is a V4, just checked.

Post automatically merged: Feb 14, 2024

I'm 99% sure the cpu capacitor is not soldered properly.

Ok, I'll double check the soldering here but I kinda doubt it. It looked pretty solid under the microscope

Your 99% is wrong cause this issue is related to D0. I've seen this so many times to know its the usual culprit.

This has always been a point in which I wonder if it is not the culprit since mine is just stuck by contact, meaning my D0 adapter is solderted to the board and such but not to the actual point since I've read that soldering could potentially cause issues with the emmc in the long run due to the introduction of other solder and the reheating of the chip itself.
Is there any adapter that is prefered or know to have better success?

 

[Hayato213]

My guess Dat0

 

[redmagejosh]

My guess Dat0

What's the recommended adapter? I used the one that came with the chip, nothing fancy.

 

[Hayato213]

What's the recommended adapter? I used the one that came with the chip, nothing fancy.

The one that came with the chip work fine, it come down to how well the soldering is, I have a v4 also, mine glitch 100% of the time.

 

[redmagejosh]

The one that came with the chip work fine, it come down to how well the soldering is, I have a v4 also, mine glitch 100% of the time.

Ok, might need to maybe resolder it applying more pressure into the emmc. Did you reflow your emmc to attach the adapter or just have it by contact?

 

[Hayato213]

Ok, might need to maybe resolder it applying more pressure into the emmc. Did you reflow your emmc to attach the adapter or just have it by contact?

I bought mine pre modded.