Aura H2O No touch - Water on your screen? message

[cureheaded]

Hello everybody,

I have two Aura H2O. Both got totally stuck. So I opened them up to see the SD card shifted.
I created a new SD card from an image (Thanks again David!) but on booting they both gave me the error "Water on Screen?" and there is no more touch.
To be clear there is no water on screen and they never were in water
Anybody has an idea?
Multiple reboots (and to the "critical error - Factory reset?" screen, but no touch ...
At the moment they are not in the case, but I don't think thus has anything to do with this (?)

Thx 4 your help/feedback/ideas!!

[Quoth]

Misalignment of the bezel. It's an IR light pipe putting beams across the screen. The PCB has IR LEDs and photo-transistors. The black is transparent to infrared and the bumps are some kind of lenses.

Also the touch thus won't work at all if the unit isn't assembled in the case! Later models use capacitive touch which makes the screen slightly dimmer but otherwise has less problems.

[cureheaded]

Originally Posted by Quoth

Misalignment of the bezel. It's an IR light pipe putting beams across the screen. The PCB has IR LEDs and photo-transistors. The black is transparent to infrared and the bumps are some kind of lenses.

Also the touch thus won't work at all if the unit isn't assembled in the case! Later models use capacitive touch which makes the screen slightly dimmer but otherwise has less problems.

Thanks for the swift and thorough reaction. Never taught it had to be assembled for this ...
thanks again!

[John F]

Have you tried disabling water detection: Reading Settings, page 2?

[DNSB]

The problem for the OP with the IR touch screen is not going to allow them to disable water detection since they state that there is no more touch. They could edit the Kobo eReader.conf file but until the bezel alignment is corrected, that would not be helpful.

[Quoth]

Originally Posted by John F

Have you tried disabling water detection: Reading Settings, page 2?

That's not the problem. You get that message if either the bezel isn't fitted at all or not aligned properly on the IR touch. Because when you don't touch all the photo transistors will pick up IR. If it was working properly and some or many photo transistors don't get a signal and you are not touching it, the likelihood is water. Spots/drops of water would look like multiple touches which isn't supported.

Obviously if the bezel isn't assembled you can't change any settings anyway.

[Quoth]

Originally Posted by cureheaded

…
Multiple reboots (and to the "critical error - Factory reset?" screen, but no touch ...
At the moment they are not in the case,
…

With this model (and most IR based touch made by anyone) the screen does not sense touch at all ever. You are blocking invisible IR light beams just above the surface that are fed and received via the bezel acting as a light pipe to IR LEDs and photo transistors on the PCB. Visible LEDs (if fitted) will be for a layer on the screen for a front light. Older gadgets with IR touch don't have illumination LEDs.

[John F]

Originally Posted by Quoth

...

Obviously if the bezel isn't assembled you can't change any settings anyway.

Obviously.

(Other then editing the config file?)

[Quoth]

Originally Posted by John F

(Other then editing the config file?)

But the default is tap to connect, so by default it won't connect and you can't edit...

[DNSB]

Since the OP had the Aura H2O open and had re-imaged the µSD card, it would be moderately simple to edit Kobo eReader.conf after mounting the card in their computer. Please note that what I might consider simple after a career in electronics and IT may not be considered simple to others.

[Quoth]

Originally Posted by DNSB

Since the OP had the Aura H2O open and had re-imaged the µSD card, it would be moderately simple to edit Kobo eReader.conf after mounting the card in their computer. Please note that what I might consider simple after a career in electronics and IT may not be considered simple to others.

Yes, I was thinking you can edit the card, but perhaps the only setting worth adding is the automatically connect to USB without a prompt?
What was that and where does it go?

[DNSB]

Originally Posted by Quoth

Yes, I was thinking you can edit the card, but perhaps the only setting worth adding is the automatically connect to USB without a prompt?
What was that and where does it go?

[DeveloperSettings]
AutoUsbGadget=True

[Quoth]

Thanks. I think I'd only use that for tests, not general use as some chargers confuse Kobos.

[DNSB]

Originally Posted by Quoth

Thanks. I think I'd only use that for tests, not general use as some chargers confuse Kobos.

Pretty much how I use it. When I'm sitting at the computer and going to be connecting/disconnecting multiple times, I toggle it on from NickelMenu and then toggle off when I'm done.