Switch oled hwfly stuck on black screen with purple flashing then red

[Crihaxx]

Hi there.
I have a modded switch with hwfly, it was working fine but i noticed that rest mode causes some issues to console, it freezes and i have to do hard reset.
Sometimes when i do this my console completely stucks on black screen with or without sd card inserted, and purple light flashing for about two minutes then some red flash and then again purple and so on.
I managed to reboot the console in this situation sometimes it happened, but this time in this right moment it doesn’t boot into hekate.
Do you have any suggestions?
I already checked the files on sd card and i have also the payload.bin in root of it (also because mod was going and i was playing quitely good until yesterday evening).

 

[Phantomas77]

If it was working fine before and stopped now, I immagine that some connection was loose or not solid at the beginning.
Can you open it and check the CLK, CMD and DAT0 values with multimeter on diode mode (red probe on GND)? Share those values and some high-res install pictures would be useful for further diagnostics.

When you get the console open, try to reset the chip. Do you have the V4 installed?

 

[Hayato213]

Your issue is either CLK, DAT0, CMD or the eMMC, most likely bad DAT0.

 

[Crihaxx]

If it was working fine before and stopped now, I immagine that some connection was loose or not solid at the beginning.
Can you open it and check the CLK, CMD and DAT0 values with multimeter on diode mode (red probe on GND)? Share those values and some high-res install pictures would be useful for further diagnostics.

When you get the console open, try to reset the chip. Do you have the V4 installed?

I don’t know exactly because i bought with hwfly on it, i can open and try to see which hwfly version is.
Please can you share the exact values i have to measure on diode mode? I mean i know about 0.8 v but if i’m not wrong there is a 1.5 v point which I don’t remember.
Also i’d like to test the resistances values for sp1 and sp2 vs gnd but don’t remember also these values.

Post automatically merged: Apr 4, 2023

Your issue is either CLK, DAT0, CMD or the eMMC, most likely bad DAT0.

Until yesterday evening booted many times with hekate.
Only had some freezes when opening tinfoil and another time resuming playing after half hour rest mode with unresponsive joycons, but i don’t think it’s a dat0 problem..

 

[Mena]

I don’t know exactly because i bought with hwfly on it, i can open and try to see which hwfly version is.
Please can you share the exact values i have to measure on diode mode? I mean i know about 0.8 v but if i’m not wrong there is a 1.5 v point which I don’t remember.
Also i’d like to test the resistances values for sp1 and sp2 vs gnd but don’t remember also these values.

Post automatically merged: Apr 4, 2023

Until yesterday evening booted many times with hekate.
Only had some freezes when opening tinfoil and another time resuming playing after half hour rest mode with unresponsive joycons, but i don’t think it’s a dat0 problem..

it's probably dat0.

 

[Crihaxx]

it's probably dat0.

I’ll definely get in touch with the installer and make him check it.
So just to do a test, if i unplug the flat from hwfly to make the console to not see the modchip it should boot on ofw? Maybe i could try this.

 

[Mena]

I’ll definely get in touch with the installer and make him check it.
So just to do a test, if i unplug the flat from hwfly to make the console to not see the modchip it should boot on ofw? Maybe i could try this.

You need to unplug the tegra and desolder reset

 

[Phantomas77]

I’ll definely get in touch with the installer and make him check it.
So just to do a test, if i unplug the flat from hwfly to make the console to not see the modchip it should boot on ofw? Maybe i could try this.

Check directly with the installer, if he's a professional, he should take care of it.
If not, the values from my install are --> here

 

[Crihaxx]

Check directly with the installer, if he's a professional, he should take care of it.
If not, the values from my install are --> here

Checked the diodes on D, A, C , 3.3V and B and they are in range around less than 0.5V (something like 0.46V).
I didn’t check the resistors to sp1 and sp2 vs gnd.
Also tried to disconnect the battery and the flex on the hwfly coming from sp1 and sp2 point but still nothing.
At this point only thing i can do is take it to the installer and see.

 

[Phantomas77]

Try to reset the chip by shorting these two points (see attachment) with tweezers when turning on the console, the chip should retrain.

Another way to reset it is via USB connection: do you have USB adapter from the chip? If so, you can insert the adapter to the chip (take caution so "UP" letters should be upwards) and connect to the chip via PC with SSH program like Putty, by connecting to the COM port number where your chip is detected when you plug the USB.
Then run "R" for reset: afterwards run "D" for diagnostics. The console output will give some errors when there's something wrong.

Once again, it's better to contact the seller and let him fix this.

 

[Crihaxx]

Try to reset the chip by shorting these two points (see attachment) with tweezers when turning on the console, the chip should retrain.

Another way to reset it is via USB connection: do you have USB adapter from the chip? If so, you can insert the adapter to the chip (take caution so "UP" letters should be upwards) and connect to the chip via PC with SSH program like Putty, by connecting to the COM port number where your chip is detected when you plug the USB.
Then run "R" for reset: afterwards run "D" for diagnostics. The console output will give some errors when there's something wrong.

Once again, it's better to contact the seller and let him fix this.

Also seen on another thread that also draining the battery could help in resetting the chip.
I’ll try this before trying on the chip with tweezers..unfortunately don’t have usb port for resetting with Putty.
After these tries then I’ll give the ball to the installer.

Post automatically merged: Apr 5, 2023

I let the console turned on trying to glitch during the night and this morning found it on hekate.
But when trying to go to get info i noticed I had failed to init message on emmc, with slow mode.
I’m starting to think there’s something wrong with the emmc.
I hope if so that a reballing could fix this, I don't know if it could be swapper to another emmc module, but for sure I don’t have the tools for this job.

 

[Crihaxx]

You need to unplug the tegra and desolder reset

So if I desolder the point B and unplug the flat going from sp1 and sp2 to the hwfly board it should work in ofw?
I don’t know if you have read new messages but yesterday night after leaving trying to glitch i found it on hekate but when trying to boot it didn’t and moreover in emmc info i’ve read “slow mode” and “failed to init”.
This is a very strange behaviour..

 

[Phantomas77]

What did the seller say?

 

[Crihaxx]

What did the seller say?

Unfortunately I’ll give him the switch next week after easter.
Moreover because i bought the console (which I tested before and it was working fine) from a guy who made it being modded from him, he’s asking a 30€ fee for doing a check to see what’s happening and then if it is an hardware thing he will make me know about the costs.
So I was finding a way (not doing soldering and risky stuffs) to try fixing myself with some workarounds, but if it still won’t work until next week then I’ll give the ball to him.

 

[Phantomas77]

The chip reset did not help either?

 

[Crihaxx]

The chip reset did not help either?

I made the console to fully discharge, not have opened again it up, but there was yellow then a fast red then again yellow (instead of purple).
I think a fast try could be to unplug the hwfly and desolder the rst to test if without the chip the console is working.

Post automatically merged: Apr 6, 2023

Checked also resetting after opened and still nothing.
Tried also unplugging the flex cable and desoldering 3.3V and rst points and still black screen.
Did some measurements and here they are, also with a video of the problem.

 

[Phantomas77]

Those values seem ok, but I still suspect DAT0 adapter, since usually it's the only point which is not soldered (apart from eMMC reball). Though it's weird that it won't boot OFW after desoldering +3.3V... Better to check it with the seller at this point.

 

[Crihaxx]

Those values seem ok, but I still suspect DAT0 adapter, since usually it's the only point which is not soldered (apart from eMMC reball). Though it's weird that it won't boot OFW after desoldering +3.3V... Better to check it with the seller at this point.

I hope it’s dat0 and not for example a corrupted emmc.
But at this point i’ll give to him next week then will see.
For sure I’ll give an update here for someone in future who could be looking for same infos.

 

[Crihaxx]

Measured shorts on capacitances in this point..what can be the solution?
Edit: the upper part on first photo are capacitances right under the apu.
Moreover i found also another point with shorted capacitances, lower respect to the hwfly chip.

 

[Crihaxx]

The installer said me he measured a kohm resistance between D and gnd.
He said normally this should be around 4-5 Mohm, so he thinks this is a faulty emmc or apu which could happen in some switch console.
Have to swap the motherboard unfortunately.