Aura HD Kobo not updating its firmware beyond the version 4.26

[gabs]

Hello my dudes. I hope all is well.

I had to change the device's internal micro SD and replaced it with a Kingston 8GB. So I uploaded an image of firmware version 2.4 kindly provided by a forum user. So far so good. The problem happened when I tried to update the firmware. I tested all the newer ones manually and the only one that the device accepted was version 4.26 (the others bricked the device needing to do a hard reset). Does anyone have an idea what could be happening? Thanks.

[geek1011]

Explain "bricked".

[gabs]

Originally Posted by geek1011

Explain "bricked".

sorry, english isn’t my native language. bricked as a vertical line with three ‘C-’ symbols. something like this

[John F]

Until someone more knowledgeable comes along...

That looks like a 90degree rotation telling you not to cycle power while it is doing something (repeated vertically). Are you sure you have the right firmware for your model?

[gabs]

Originally Posted by John F

Until someone more knowledgeable comes along...

That looks like a 90degree rotation telling you not to cycle power while it is doing something (repeated vertically). Are you sure you have the right firmware for your model?

I got all firmwares from this website and the 4.26 version is working as intended, but honestly I don’t know if it’s 100%. what site you guys use?!

[Quoth]

Originally Posted by gabs

I got all firmwares from this website and the 4.26 version is working as intended, but honestly I don’t know if it’s 100%. what site you guys use?!

That's the correct site and it gets FW from Kobo server(s).

I've seen that image and sometimes a frightening long upgrade, but it came OK. Make sure well charged and cable USB disconnected.

[gabs]

Originally Posted by Quoth

That's the correct site and it gets FW from Kobo server(s).

I've seen that image and sometimes a frightening long upgrade, but it came OK. Make sure well charged and cable USB disconnected.

Interesting! I gave up after an hour. I will try to leave it overnight and I’ll share the results tomorrow!

[Quoth]

Originally Posted by gabs

Interesting! I gave up after an hour. I will try to leave it overnight and I’ll share the results tomorrow!

An hour sounds broken. Less than 5 minutes. Try a fresh download as the Kobo servers were poor for a while.

I think I had a new version than that on the Kobo Aura H2O original.

[gabs]

Quick update: So I tried to leave it updating overnight and it didn’t work :/

[DNSB]

Please check your PMs.

[konsulex]

I have a Kobo Aura HD that developed an issue with the original system. To try to fix it, I opened the device, replaced the internal microSD card, and flashed a firmware image that was provided to me from this site.
The image used was Kobo_N204B_Aura_HD.

The device boots normally, the e-ink screen displays a perfect image, and it reaches the language selection screen, however the touch does not respond at all.

Some important points:

The screen works normally (perfect image, no artifacts)

The issue is exclusively with the touch, completely non-responsive

The Kobo was working normally before the software issue

After replacing the microSD and installing the firmware, the touch has never responded

I have already considered poor contact, but it does not appear to be the digitizer (touch) flat cable, which is the thinner one

My main questions are:

Is this symptom (image OK, touch completely dead) typical of incompatible firmware on the Aura HD?

Can anyone confirm which .img image is the correct one specifically for the Kobo Aura HD (N204B / dragon)?

Is there any additional test I can perform to reliably distinguish between a firmware issue and a physical digitizer failure?

Is there any known way to fix this issue?

Any guidance would be greatly appreciated.
Thank you in advance.