Unlocking 32 inch Wallboard Outcome Health

[tylamb19]

Did you ever make any additional progress? I found myself in the same situation. I was able to get into settings using the three finger menu and then deviated from what others had outlined by just uninstalling apps through the menu. Once I uninstalled the synop app, the menu crashed. I can't get into any form of settings, debug mode does not appear to be enabled so it doesn't show up in adb. I can use the volume up button to enter recovery mode, but have had no luck finding an image / format that recovery would automatically pull. In recovery mode, I can press the volume up and power buttons simultaneously three times to get the context menu, but without a volume down button, I can't get to the right option in the menu. It starts at reboot. There are buttons on the internal board labeled reset and recover. The recover button is the same volume up button that is in the pinhole and the rest button just appears to be a hard power off for the board itself.

If anyone has any more ideas, I would greatly appreciate it.

And now I'm stuck

If anyone could give me direction/etc to get past where I'm at, I'd appreciate it.

I bought one of these bad boys from an auction and thankfully found this post and started the task of customizing it. I got to the point to where I deleted the apps listed, all through adb reboot recovery (used Generic RK32 with SDcard).

However, on reboot, it didn't go into recovery and had the Context Health splash to a nature backdrop and an Error: Wallboard not installed message. USB debug wasn't persistent, and trying everything that worked previously, I can't seem to get into Safe Mode, and I haven't found any other ways to get into Settings.

I did find the "reset" hole on back, which otherwise functions as a hardware 'Volume Up', but have yet to find any [Boot to Recover] methods involving only Volume Up and Power that work.

Any ideas of things to try?

Thank you

Update 1: Still no luck overall, but somewhat of progress, I hope: Plugging in the DC automatically boots up everything. If I hold down the hardware volume up/reset while adding power AND have USB plugged in, I get a listing in Device Manager; however, the screen stays black. Otherwise, as far as getting my PC to notice it, this is the only means to do it. There is no connection when powered on normally, rather I plug in USB before or after providing power. Also, spamming the power button while booting in order to get into Safe Mode had worked initially. Now doing it causing a freeze on the second or third splash screen refresh.

If either of you still have these tablets! I've got one of these and did the exact same thing. I figured out you can use a USB keyboard in the bottom port (the one on the same side as the DC jack) to press the "volume down" key on the keyboard to get to the reset option in the recovery mode context menu. The keyboard model I used was a Dell 0RKR0N.

 

[ryanmar89]

If either of you still have these tablets! I've got one of these and did the exact same thing. I figured out you can use a USB keyboard in the bottom port (the one on the same side as the DC jack) to press the "volume down" key on the keyboard to get to the reset option in the recovery mode context menu. The keyboard model I used was a Dell 0RKR0N.

I still have quite a few of these tablets but they are still all rocking the stock android 4.4 ROM as I haven't found a way to upgrade them. If there is a way to get at least android 6 on them, I would be happy with that.

I've got one of them mounted in my garage for Spotify and YouTube and it works great for that. However, It is kind of a pain as far as getting any sort of other functionality out of them with the stock ROM.

Maybe one day when I have the time, I'll mess around with them and see if I can maybe get another board compatible with a newer android version or find out how to upgrade these without bricking them.

 

[ryanmar89]

Sorry everyone, life got in the way of this project and I have not touched it in awhile. I actually kept 2 of these and parted out the others. I bricked one in an attempt to install a custom ROM that was Android 6 but I still have one that is in usable stock condition. I also went down the road of purchasing another board for these from China, but could not get a clear answer as what Android version it was running from the manufacturer. I then went down the alternate road of hardwiring the touchscreen cables into a USB A end and hooking it up to a RaspberryPi, which works great, but I cannot find an LCD converter to hook HDMI directly into the video portion of the screen.

All of that to say, if there is still active interest in these, I am game to contribute. @chrisdsj how can I best pull a stock firmware out for you?

Do you know where you found that board from China? I might bite the bullet and purchase one if I can aquire it at a decent price.

 

[tylamb19]

Sorry everyone, life got in the way of this project and I have not touched it in awhile. I actually kept 2 of these and parted out the others. I bricked one in an attempt to install a custom ROM that was Android 6 but I still have one that is in usable stock condition. I also went down the road of purchasing another board for these from China, but could not get a clear answer as what Android version it was running from the manufacturer. I then went down the alternate road of hardwiring the touchscreen cables into a USB A end and hooking it up to a RaspberryPi, which works great, but I cannot find an LCD converter to hook HDMI directly into the video portion of the screen.

All of that to say, if there is still active interest in these, I am game to contribute. @chrisdsj how can I best pull a stock firmware out for you?

I have been in contact with a few sellers of the LVDS controller boards and one of them has a board that they say is compatible with the screen in these tablets (AUO Display T320HVN05.6). I ordered one and once it's here I'll update this thread with more info on how it works. I am also trying to fit a Pi with that converter and use that as the "computer" instead of the stock board. I've got the touch working, but the screen is now waiting on the board shipping from China.

 

[pedwards3x]

Sorry for the lack of replies here! I still have two of these in my possession. The one is running stock and functions, but I need it to be snappier and past Android 4.4 to have real usability. The second one I bricked in an attempt to update to a custom ROM that I thought would match the chipset. @tylamb19 I actually did the same thing with a Pi that I could the touchscreen working but the converters I purchased for video (all from Amazon) never output anything. If you find something that works that would be fantastic! Keep me posted for sure!

 

[pedwards3x]

Do you know where you found that board from China? I might bite the bullet and purchase one if I can aquire it at a decent price.

I will dig through my email but I do not remember off the top of my end. I never actually got one ordered because the customer service was not helpful. Plus it was about $150 if I remember correctly.

 

[tylamb19]

Sorry for the lack of replies here! I still have two of these in my possession. The one is running stock and functions, but I need it to be snappier and past Android 4.4 to have real usability. The second one I bricked in an attempt to update to a custom ROM that I thought would match the chipset. @tylamb19 I actually did the same thing with a Pi that I could the touchscreen working but the converters I purchased for video (all from Amazon) never output anything. If you find something that works that would be fantastic! Keep me posted for sure!

The other thing I was thinking of trying (if the LVDS driver board doesn't work) revolves around the fact that the AUO T320HVN05.6 was used in a bunch of 32" lower-end TVs (Vizio, RCA, Sharp, etc) so I could find a mainboard for one of those TVs and use it as the "converter" for HDMI to LVDS. That should work as well.

 

[pedwards3x]

That would be interesting to see too. Honestly that seems like the best path forward. Pi with a giant touchscreen would be just as useful as an Android tablet for my use case.

 

[ryanmar89]

That would be interesting to see too. Honestly that seems like the best path forward. Pi with a giant touchscreen would be just as useful as an Android tablet for my use case.

What I thought about doing is getting the display to HDMI and then the touch screen to USB and link it to one of those small form factor PCs and attach it to the back of one of these. It would be a cool project but I am unsure where I could get all of the parts necessary.

 

[tylamb19]

What I thought about doing is getting the display to HDMI and then the touch screen to USB and link it to one of those small form factor PCs and attach it to the back of one of these. It would be a cool project but I am unsure where I could get all of the parts necessary.

This is essentially what I'm trying to do. The RasPi is just a system I already had lying around, it could be interchanged with any SFF or (more preferably) SBC or USFF computer. I've got the touchscreen pinout connected to a normal USB port and it works on its own, I just am waiting on the HDMI to LVDS screen controller board to show up from China...

 

[ryanmar89]

Sorry everyone, life got in the way of this project and I have not touched it in awhile. I actually kept 2 of these and parted out the others. I bricked one in an attempt to install a custom ROM that was Android 6 but I still have one that is in usable stock condition. I also went down the road of purchasing another board for these from China, but could not get a clear answer as what Android version it was running from the manufacturer. I then went down the alternate road of hardwiring the touchscreen cables into a USB A end and hooking it up to a RaspberryPi, which works great, but I cannot find an LCD converter to hook HDMI directly into the video portion of the screen.

All of that to say, if there is still active interest in these, I am game to contribute. @chrisdsj how can I best pull a stock firmware out for you?

Was there some sort of wiring diagram that you followed to get the touch screen cables to USB A? I might try that and see if I can get an HDMI to LVDS board for the screen itself. If that works, I might get a little adventurous to try and figure out the little 12 inch tablets as well for a RaspberryPi.

 

[ryanmar89]

Was there some sort of wiring diagram that you followed to get the touch screen cables to USB A? I might try that and see if I can get an HDMI to LVDS board for the screen itself. If that works, I might get a little adventurous to try and figure out the little 12 inch tablets as well for a RaspberryPi.

Nvm I guess I an dumb. I didn't realize it says next to the connector on how the wires connect.

 

[ryanmar89]

This is essentially what I'm trying to do. The RasPi is just a system I already had lying around, it could be interchanged with any SFF or (more preferably) SBC or USFF computer. I've got the touchscreen pinout connected to a normal USB port and it works on its own, I just am waiting on the HDMI to LVDS screen controller board to show up from China...

Where did you happen to find the HDMI to LVDS screen controller board? I haven't been able to find any compatible with these screens.

 

[ryanmar89]

Well I had just fried my first one... I found an HDMI to LVDS board that was compatible with the screen. Plugged it in and it fried my tcon board. It had let out the magic smoke. Oh well. I got 11 more working ones with android 4.4. I guess I'll be stuck with those for now until I come back to that at a later date when and if someone else manages to get their's working.

 

[tylamb19]

Ok, here is my update! After 4 rounds going back and forth with my Chinese supplier and one killed LCD TCON board, we found a board that works! The giant Pi tablet is now functional!

Inside the unit I put the Pi, LVDS converter, the original inverter board, and power supply for the Pi. It's stuffed into the space that the original hardware used and covered in a generous layer of electrical tape, and then stuck on with 3M Command strips, lol. The back cover closes without any noticable change (other than the button board for the LCD controller, and the power cord being stuffed inside) from the original configuration.

Well I had just fried my first one... I found an HDMI to LVDS board that was compatible with the screen. Plugged it in and it fried my tcon board. It had let out the magic smoke. Oh well. I got 11 more working ones with android 4.4. I guess I'll be stuck with those for now until I come back to that at a later date when and if someone else manages to get their's working.

My unit's LCD model is the AUO Display T320HVN05.6. Is yours different? That looks like an LG chip, mine is all AUO.

 

[ryanmar89]

Ok, here is my update! After 4 rounds going back and forth with my Chinese supplier and one killed LCD TCON board, we found a board that works! The giant Pi tablet is now functional!View attachment 5824715

Inside the unit I put the Pi, LVDS converter, the original inverter board, and power supply for the Pi. It's stuffed into the space that the original hardware used and covered in a generous layer of electrical tape, and then stuck on with 3M Command strips, lol. The back cover closes without any noticable change (other than the button board for the LCD controller, and the power cord being stuffed inside) from the original configuration.
View attachment 5824723
View attachment 5824725



My unit's LCD model is the AUO Display T320HVN05.6. Is yours different? That looks like an LG chip, mine is all AUO.

It maybe different. What does your tcon board look like? Mine also has a label on the back of the screen. Looks like an LG display.
I'll have to rip apart another one of mine to see if they are all like that.

 

[tylamb19]

Yeah that's a completely different screen model from mine. Ironically, usually LG panels are the easiest to find controller boards for. My TCON board looks like this:

Message the user nyplatform on eBay with your LCD model number, they are the supplier I was working with. They have decently fast shipping as they use a warehouse in NY.

 

[ryanmar89]

Yeah that's a completely different screen model from mine. Ironically, usually LG panels are the easiest to find controller boards for. My TCON board looks like this:View attachment 5824769

Message the user nyplatform on eBay with your LCD model number, they are the supplier I was working with. They have decently fast shipping as they use a warehouse in NY.

Interesting! I opened another one of my boards and this one has an AUO screen. It looks like their newer versions have LG screens and the older ones use AUO.

 

[tylamb19]

If you've got one with the AUO screen, message that user on eBay and provide them the T320HVN05.6 LCD model number, they should be able to provide the same controller and button board they provided me.

The original LVDS cable, inverter, and inverter cable gets reused with the new board. WATCH OUT for reversed polarity with the cable provided with the inverter when plugging it into the board. This is how I killed one of the LVDS controllers. If yours needs to be flipped, just trim the protruding parts on the plastic connector on the cable off and it should fit into the slot the opposite way.

 

[ryanmar89]

If you've got one with the AUO screen, message that user on eBay with the T320HVN05.6 LCD model number, they should be able to provide the same controller and button board they provided me.

The original LVDS cable, inverter, and inverter cable gets reused with the new board. WATCH OUT for reversed polarity with the cable provided with the inverter when plugging it into the board. This is how I killed one of the LVDS controllers. If yours needs to be flipped, just trim the protruding parts on the plastic connector on the cable off and it should fit into the slot the opposite way.

That's probably what I did to kill the lvds board. I wonder if I had reversed the polarity. How would I know which way to connect the cable? Cause I wouldn't want to flip it on accident again if that's what I did.