Develop Bugs

A little bit bricked phone.

Sorry my english is not the best.
I do yesterday my first root. All going good. I got my phone rooted - New android versioon 4.4.2
But after a few hours I think I change my rom. I looking a youtube a good video. I find it.
I do all like video if im completed I restart my phone and after this my phone is bricked.
http://forum.xda-developers.com/showthread.php?t=2565752 - i try this on my phone. Yes, this is bad way but know is too late.
Phone is turned on but no picture. If I do that: Press and hold volume donw and connect your device to computer with micro usb cable I see some options.
Like that:
- Start
- Restart bootloader
- Recovery mode
- Power off
But i dont know what i need to do next. Somebody help me please?
I hope you guys understand my bad english and my probleem.
Yes, i am dumbass.

I think U must go back to stock rom and start from zero
Here´s a guide for it: http://forum.xda-developers.com/showthread.php?t=2498102
:good:
Good luck
<AhhA> said:
Sorry my english is not the best.
I do yesterday my first root. All going good. I got my phone rooted - New android versioon 4.4.2
But after a few hours I think I change my rom. I looking a youtube a good video. I find it.
I do all like video if im completed I restart my phone and after this my phone is bricked.
http://forum.xda-developers.com/showthread.php?t=2565752 - i try this on my phone. Yes, this is bad way but know is too late.
Phone is turned on but no picture. If I do that: Press and hold volume donw and connect your device to computer with micro usb cable I see some options.
Like that:
- Start
- Restart bootloader
- Recovery mode
- Power off
But i dont know what i need to do next. Somebody help me please?
I hope you guys understand my bad english and my probleem.
Yes, i am dumbass.
Click to expand...
Click to collapse

ErnestoD said:
I think U must go back to stock rom and start from zero
Here´s a guide for it: http://forum.xda-developers.com/showthread.php?t=2498102
:good:
Good luck
Click to expand...
Click to collapse
Thank you.
I look one fail i downloaded it's here http://forum.xda-developers.com/showthread.php?t=2498102&page=12 i understand this a little bit more.
but my question is 3. Download drivers, LG Mobile Support Tool, patch and flashing tool where i get best driver and patch and flashing tool on my phone? Do you know?

<AhhA> said:
Sorry my english is not the best.
I do yesterday my first root. All going good. I got my phone rooted - New android versioon 4.4.2
But after a few hours I think I change my rom. I looking a youtube a good video. I find it.
I do all like video if im completed I restart my phone and after this my phone is bricked.
http://forum.xda-developers.com/showthread.php?t=2565752 - i try this on my phone. Yes, this is bad way but know is too late.
Phone is turned on but no picture. If I do that: Press and hold volume donw and connect your device to computer with micro usb cable I see some options.
Like that:
- Start
- Restart bootloader
- Recovery mode
- Power off
But i dont know what i need to do next. Somebody help me please?
I hope you guys understand my bad english and my probleem.
Yes, i am dumbass.
Click to expand...
Click to collapse
Did you a backup ? You can try push a custom rom via adb and install it via recovery. Which recovery do you use?

I dont have backup and cant rembmer which recovery
And im not the best if this things. I need more explanation

1. Delete all LG software from PC and reboot - DONE
2. Download KDZ you want - DONE
3. Download drivers, LG Mobile Support Tool, patch and flashing tool
Drivers - DONE
Mobile support - DONE
Patch - what was it? Please download link
Flashing tool - what was it? Please download link
Im stuck at point 3. Stupid my english. I don't understand, patch and flashing tool. Where i find it.

Help me root this thing PLEASE

So here's the thing: I've just gotten hands on my G4, and I've been sitting here for 6 HOURS straight trying to root it, so I could install TWRP and then install CM13. But it's being F***** IMPOSSIBLE, I've tried loads of guides and tools and all I've got so far was a soft brick (which I managed to fix after a hard reset) and a big headache. Also, is there anyway I could root it on Android 6.0? Because when I tried to root it earlier I had to download this 1.4GB file that would literally take 10 hours to download. NOPE. Either I root it on Android 6.0 or anyone links me someplace else to download it, or it's not gonna happen. So anyway, any good sould would PLEASE explain me step by step how to do this? I used to mod phones a lot back in 2014 but it's been a while since I did it. My G4 is the H815.

TheBloodEagle27 said:
So here's the thing: I've just gotten hands on my G4, and I've been sitting here for 6 HOURS straight trying to root it, so I could install TWRP and then install CM13. But it's being F***** IMPOSSIBLE, I've tried loads of guides and tools and all I've got so far was a soft brick (which I managed to fix after a hard reset) and a big headache. Also, is there anyway I could root it on Android 6.0? Because when I tried to root it earlier I had to download this 1.4GB file that would literally take 10 hours to download. NOPE. Either I root it on Android 6.0 or anyone links me someplace else to download it, or it's not gonna happen. So anyway, any good sould would PLEASE explain me step by step how to do this? I used to mod phones a lot back in 2014 but it's been a while since I did it. My G4 is the H815.
Click to expand...
Click to collapse
There is an excellent guide right here on the forums:
http://forum.xda-developers.com/g4/general/howto-complete-guide-to-unlock-twrp-t3370003

Vseprz said:
There is an excellent guide right here on the forums:
http://forum.xda-developers.com/g4/general/howto-complete-guide-to-unlock-twrp-t3370003
Click to expand...
Click to collapse
>fastboot oem device-id
> waiting for any device
And it just stays like that...

TheBloodEagle27 said:
>fastboot oem device-id
> waiting for any device
And it just stays like that...
Click to expand...
Click to collapse
Are you using the stock cable and a usb 2.0 port? Did you install the drivers linked to in the guide?

Vseprz said:
Are you using the stock cable and a usb 2.0 port? Did you install the drivers linked to in the guide?
Click to expand...
Click to collapse
1. Yes
2. Not sure, I think all my USB ports are 3.0
3. Yes, installed the 15 sec adb drivers
Also, running win 10 x64
Edit: Yep, no 3.0 ports on my pc: http://imgur.com/shDGoFb

TheBloodEagle27 said:
1. Yes
2. Not sure, I think all my USB ports are 3.0
3. Yes, installed the 15 sec adb drivers
Also, running win 10 x64
Click to expand...
Click to collapse
Look at the port. If it is blue it is a 3.0. Try to find one that is not.

Vseprz said:
Look at the port. If it is blue it is a 3.0. Try to find one that is not.
Click to expand...
Click to collapse
Still nothing, tried all my usb ports

I FIGURED IT OUT: I needed to disable windows 10 driver signature, I did this by clicking on the windows icon, holding shift and pressing restart. Then going into troubleshoot, startup and pressing the 7 key, BOOM, got the fastboot oem device-id command working. Now when I try to unlock the bootloader it says that the LGH815P is not supported? NO WAY

Did I finally bricked my 4k firetv?

I just see black screen with fire tv now. It doesn't show up when I type adb devices anymore. I was running commands on it left and right. I was able to unlock bootloader after hardware mode then was trying to install a custom rom ??? The command I know was something like abcde .......wipe/ system ._. Yea I know. Tried to do the hardware mod again but not picking it up. Is it gone ?

tune345 said:
I just see black screen with fire tv now. It doesn't show up when I type adb devices anymore. I was running commands on it left and right. I was able to unlock bootloader after hardware mode then was trying to install a custom rom ??? The command I know was something like abcde .......wipe/ system ._. Yea I know. Tried to do the hardware mod again but not picking it up. Is it gone ?
Click to expand...
Click to collapse
TWRP is still there when you restart/boot the stick? (you have to use OTG y cable + mouse in order to check that).
If TWRP is still there, then you can use it to restore a full stock rom or flash the system image.

tune345 said:
I just see black screen with fire tv now. It doesn't show up when I type adb devices anymore. I was running commands on it left and right. I was able to unlock bootloader after hardware mode then was trying to install a custom rom ??? The command I know was something like abcde .......wipe/ system ._. Yea I know. Tried to do the hardware mod again but not picking it up. Is it gone ?
Click to expand...
Click to collapse
What custom rom (there isn't one available for the 4k)? From a linux install try a lsusb and see if anything is there (preloader or phone). When you were running commands, were you in the hacked fastboot? As @Pretoriano80 said, get in into twrp and flash, here is a link to the latest to flash to restore, but hopefully you made a backup for you started.
https://forum.xda-developers.com/fire-tv/general/official-stock-image-fire-tv-stick-4k-6-t4059777

Pretoriano80 said:
TWRP is still there when you restart/boot the stick? (you have to use OTG y cable + mouse in order to check that).
If TWRP is still there, then you can use it to restore a full stock rom or flash the system image.
Click to expand...
Click to collapse
TWRP was there but after performing /systemwipe i just see that black screen with firetv logo on the screen it skips the TWRP :/ nothing shows up when i type in adb devices (Minimal ADB and Fastboot) like before it would give a serial number and connected status. nothing in adblink either.
i did ordered that cable like 1 month ago it's not here yet. I might ordered another one today from amazon. I was wondering isn't there any software which can turn laptop keyboard to firestick keyboard from some commands? Adb link has remote which i can use ONCE it's inside the fireOS. A physical keyboard with OTG cable is must for this ? Any alternative ?
and i did search all the first 3 pages of the forum to find the stock rom for 4k firestick but couldn't may be because its was 3 am lol
Thanks for the reply!

Michajin said:
What custom rom (there isn't one available for the 4k)? From a linux install try a lsusb and see if anything is there (preloader or phone). When you were running commands, were you in the hacked fastboot? As @Pretoriano80 said, get in into twrp and flash, here is a link to the latest to flash to restore, but hopefully you made a backup for you started.
https://forum.xda-developers.com/fire-tv/general/official-stock-image-fire-tv-stick-4k-6-t4059777
Click to expand...
Click to collapse
was trying to find the stock rom to install but was installing tank one which i think is for another version for fireos stick? i don't know what i was doing x_x Can you please put more light on that lsusb? how does it work? i don't know if i was in hacked fastboot it had fully unlocked bootloader...hmm?
Thanks for the stock rom link, i wished i would have found that last night earlier but i guess it's too late now ._. i will try the hardware mod again but it's not detecting it. i also broke one of the chip before, the hardware mode still went last night earlier so it should work again ?

tune345 said:
was trying to find the stock rom to install but was installing tank one which i think is for another version for fireos stick? i don't know what i was doing x_x Can you please put more light on that lsusb? how does it work? i don't know if i was in hacked fastboot it had fully unlocked bootloader...hmm?
Thanks for the stock rom link, i wished i would have found that last night earlier but i guess it's too late now ._. i will try the hardware mod again but it's not detecting it. i also broke one of the chip before, the hardware mode still went last night earlier so it should work again ?
Click to expand...
Click to collapse
Why you installed tank rom in mantis...
Redo kamakiri and flash prerooted.

tune345 said:
was trying to find the stock rom to install but was installing tank one which i think is for another version for fireos stick? i don't know what i was doing x_x Can you please put more light on that lsusb? how does it work? i don't know if i was in hacked fastboot it had fully unlocked bootloader...hmm?
Thanks for the stock rom link, i wished i would have found that last night earlier but i guess it's too late now ._. i will try the hardware mod again but it's not detecting it. i also broke one of the chip before, the hardware mode still went last night earlier so it should work again ?
Click to expand...
Click to collapse
Sounds like you unlocked. Did you make it to twrp?
Lsusb is a Linux command in terminal that will show what is connected. This will tell what mode it is in. I broke a chip off one of mine too (tweezers were a bad thought), but that was 7 months ago missing it and it still runs like the rest of mine sticks. The 4k is called mantis, tank is the fire stick2. Totally different.
---------- Post added at 02:30 PM ---------- Previous post was at 02:26 PM ----------
tune345 said:
was trying to find the stock rom to install but was installing tank one which i think is for another version for fireos stick? i don't know what i was doing x_x Can you please put more light on that lsusb? how does it work? i don't know if i was in hacked fastboot it had fully unlocked bootloader...hmm?
Thanks for the stock rom link, i wished i would have found that last night earlier but i guess it's too late now ._. i will try the hardware mod again but it's not detecting it. i also broke one of the chip before, the hardware mode still went last night earlier so it should work again ?
Click to expand...
Click to collapse
Rortiz2 said:
Why you installed tank rom in mantis...
Redo kamakiri and flash prerooted.
Click to expand...
Click to collapse
You never know how deep the water is until you jump head first. I admire people who try!

Rortiz2 said:
Why you installed tank rom in mantis...
Click to expand...
Click to collapse
¯\_(ツ)_/¯
Rortiz2 said:
Redo kamakiri and flash prerooted.
Click to expand...
Click to collapse
I just literally just did that process again after like 7th try but it's still the same not showing up anywhere and black screen with firetv logo. Attaching the picture of the final process, does that mean it's good? it doesn't look like the first process ending.
Thanks !

tune345 said:
¯\_(ツ)_/¯
I just literally just did that process again after like 7th try but it's still the same not showing up anywhere and black screen with firetv logo. Attaching the picture of the final process, does that mean it's good? it doesn't look like the first process ending.
Thanks !
Click to expand...
Click to collapse
That shows you an obvious error in the fastboot step.
Try using a different cable and be sure to do the process from an 2.0 Port.
Since the bootROM part is already done, just type:
Code:
sudo ./boot-fastboot.sh
Connect the stick WITHOUT SHORT ANYTHING and the script will ask to the Preloader to boot to Hacked Fastboot Mode.
When you see "Hacked Fastboot Mode" in the screen of the device, try running fastboot-step.sh again.

Rortiz2 said:
That shows you an obvious error in the fastboot step.
Try using a different cable and be sure to do the process from an 2.0 Port.
Since the bootROM part is already done, just type:
Code:
sudo ./boot-fastboot.sh
Connect the stick WITHOUT SHORT ANYTHING and the script will ask to the Preloader to boot to Hacked Fastboot Mode.
When you see "Hacked Fastboot Mode" in the screen of the device, try running fastboot-step.sh again.
Click to expand...
Click to collapse
sorry where am i entering that code exactly ? because that window was still open with the final error in the instructed directory and i entered that it said command not found so i connected it back to my other laptop and ran Minimal ADB and Fastboot and ran that command there...nothing..
then i went back to linux laptop and close the terminal and re opened a new one and ran that command again said command not found.

tune345 said:
sorry where am i entering that code exactly ? because that window was still open with the final error in the instructed directory and i entered that it said command not found so i connected it back to my other laptop and ran Minimal ADB and Fastboot and ran that command there...nothing..
then i went back to linux laptop and close the terminal and re opened a new one and ran that command again said command not found.
Click to expand...
Click to collapse
You have unlocked and flashed recovery. Do you have a OTG (google if if you don't)? looks like you have TWRP now...

Michajin said:
You have unlocked and flashed recovery. Do you have a OTG (google if if you don't)? looks like you have TWRP now...
Click to expand...
Click to collapse
i have ordered last month, still not here yet. Might order another one from amazon today. isn't there any software which can convert laptop keyboard temporarily for firestick?
and this might be thinking too oddly but lets say i have a micro usb to usb adapter after i plug that in firestick can i take a usb to usb cable and plug it into usb hub? and then plug keyboard mouse usb drive in it ....all going to firestick via usb to usb cable finally converting the signal from usb to usb micro adapter. i believe i have a usb hub which can be powered...
X_X

tune345 said:
i have ordered last month, still not here yet. Might order another one from amazon today. isn't there any software which can convert laptop keyboard temporarily for firestick?
and this might be thinking too oddly but lets say i have a micro usb to usb adapter after i plug that in firestick can i take a usb to usb cable and plug it into usb hub? and then plug keyboard mouse usb drive in it ....all going to firestick via usb to usb cable finally converting the signal from usb to usb micro adapter. i believe i have a usb hub which can be powered... _X
Click to expand...
Click to collapse
No, it has to be a otg. On boot, it will detect it and automatically give you the option for recovery. If you can get into fastboot (you were there before when you ran fastboot.sh you might be able to boot into recovery with fastboot reboot recovery or something simalar. But being in recovery you wont be able to do much unless you have adb connections, or a mouse/keyboard with OTG. Amazon is basically shipping a week for everything right now. I think you really need a OTG to pull it out. ADB and fastboot commands can really screw things up from my novice experience. Get that OTG and try it. I will warn, get one that says it will work for the firestick4k, they dont all work....Make you you give a thanks to the people trying to help, no one is getting paid here...

Michajin said:
No, it has to be a otg. On boot, it will detect it and automatically give you the option for recovery. If you can get into fastboot (you were there before when you ran fastboot.sh you might be able to boot into recovery with fastboot reboot recovery or something simalar. But being in recovery you wont be able to do much unless you have adb connections, or a mouse/keyboard with OTG. Amazon is basically shipping a week for everything right now. I think you really need a OTG to pull it out. ADB and fastboot commands can really screw things up from my novice experience. Get that OTG and try it. I will warn, get one that says it will work for the firestick4k, they dont all work....Make you you give a thanks to the people trying to help, no one is getting paid here...
Click to expand...
Click to collapse
Thank you for that information. Appreciate it. Yea everything is late on amazon now even prime :/ but hopefully i find one which works on the first try otherwise it would be a super bumber...
..but then again how would i know if it's the otg NOT working OR the firestick software/hardware? i did broke one capacitor and was running commands on it like a mad man lol , i believe the CLK one on the picture. what it is for ? why was the firestick still working almost normally after i broke it ? attaching the picture
Thanks again !

tune345 said:
Thank you for that information. Appreciate it. Yea everything is late on amazon now even prime :/ but hopefully i find one which works on the first try otherwise it would be a super bumber...
..but then again how would i know if it's the otg NOT working OR the firestick software/hardware? i did broke one capacitor and was running commands on it like a mad man lol , i believe the CLK one on the picture. what it is for ? why was the firestick still working almost normally after i broke it ? attaching the picture
Thanks again !
Click to expand...
Click to collapse
There are some that say they work. The ones i have had issues with are the OTG hubs. Depending on which chip was damaged, but i broke one off of mine too about 7 months ago (tweezers are bad) but it has been working the same as the rest of mine. could be a heat thing?

Aaahhhhh hit that virus with a brick because i was able to finally fix my firestick last night, pheww!!
thank you everyone for helping
now i need to research the fastest way to clone my ENTIRE setup. I rooted it.

tune345 said:
Aaahhhhh hit that virus with a brick because i was able to finally fix my firestick last night, pheww!!
thank you everyone for helping
now i need to research the fastest way to clone my ENTIRE setup. I rooted it.
Click to expand...
Click to collapse
I have a similar problem with my firestick, How did you manage to fix yours?

Had to do the hardware mode multiple times until i landed at TWRP screen then used adb to flash the stock rom

tinybilbo said:
I have a similar problem with my firestick, How did you manage to fix yours?
Click to expand...
Click to collapse
Were you unlocked? Unless you were playing with recovery, If you have a OTG plugged in from a power off state you should get a recovery option.

Michajin said:
Were you unlocked? Unless you were playing with recovery, If you have a OTG plugged in from a power off state you should get a recovery option.
Click to expand...
Click to collapse
Hi Michajin (Thanks for the reply)
Yes I have an unlocked bootloader, TWRP, and was rooted.
I can get into TWRP via OTG, but it doesn't matter what I flash (Stock or Pre-Rooted), all I get is a black screen (I've left it overnight just to be sure).
I was thinking maybe I should try to flash directly from bootloader rather than TWRP, or making a backup from my other firestick and trying that (the data partition at least).
Either way I'll have to do a little more research first, so any thoughts would be greatly appreciated....

Bricked 55c6us after updates attempts

Hi guys, first of all I'm sorry if is there a threat about this already. I've looked around before I started this new one.
I was having problems with Netflix rebooting my TV in the last entire month, so I downloaded myself the update in tcl Brazil website, and flashed the latest version. The problems persist, so I contacted TCL support to start procedures to have my problems solved and maybe have my TV replaced once I have one year warranty. By email the support team gave me a link to download another version of the update firmware, claiming the one I got from their website was out of date. Well, I flashed the new firmware once, factory resetet again and problems kept coming!
then I cam here in the forum and found this link support.tclelectronics.com.au/software-version
from tcl Australia, so downloaded the indicated version to my TV model 55c6us and tryed to flash it.
Well, now I'm stuck in a black screen, with no tcl boot logo, no android logo, nothing... Ive turned off and on several times holding the power button, doing all the steps to flash from USB but can't reach any boot or recover screen!
Is there a way to flash using and male to male USB cable connected to my pc? if yes, please link me. Don't know what to do =(
Thanks a lot!

had the exact same problem when trying to update to the new version. did you figured it out?

atualization: seems like the usb 3.0 port, not the service usb port now is flashing(it changed), but seems like the android OS is being built in the pendrive, by mistake. unfortunatly in the service port the firmware is not recognized anymore, i think changing the firmwere messed with a lot of things. would love if someone could help me a little. thanks

update ' i have found that i can update with .pkg files and when i do try they kind of crash but always generate some android files inside the pendrive. now i could du it on the service usb, but without video. just realized too that the tv actually turns on and enters a menu with aprox 25 options. i can hear the scroll trough the options when pressing down on the remote. but no video at all.

update ' found that the menu was the fresh installation menu, choose language and etcetera.
could configure the tv. but NO IMAGE AT ALL.
i was able to send a youtube video to the tv, the audio worked perfectly. the backlight is lit but looks like the lcd is off.
just cant figure out what did happened with the image. even in a factory reset there is no image at all. tomorrow will try t do a shop reset as last resort. if someone could help me it would be very appreciated. thank you

Hi guys, i need help with my TCL 55C6US, when the power on, it's freezes in the logo and won't do anything

gogokoko said:
Hi guys, i need help with my TCL 55C6US, when the power on, it's freezes in the logo and won't do anything
Click to expand...
Click to collapse
Semp - Download de drivers e manuais - SEMP TCL
www.semptcl.com.br

stasiof said:
Semp - Download de drivers e manuais - SEMP TCL
www.semptcl.com.br
Click to expand...
Click to collapse
Downloded it, but didn't work, message saying " no available update package. System update stopped "

gogokoko said:
Downloded it, but didn't work, message saying " no available update package. System update stopped "
Click to expand...
Click to collapse
I think must unzip and .pkg file flashed, when TV is Off.

stasiof said:
I think must unzip and .pkg file flashed, when TV is Off.
Click to expand...
Click to collapse
That what i did

Only Download Mode

Hey Guys,
I hope someone can help me.
I have a old galaxy a50 it is only booting into the download mode.

flash latest stock rom using odin

Odin can't find my connected device

Split1995 said:
Odin can't find my connected device
Click to expand...
Click to collapse
install samsung drivers

JuanTamqd21 said:
install samsung drivers
Click to expand...
Click to collapse
I've already installed them

Maybe update your drivers , like in windows update>more>optional updates or so

LR7875 said:
Maybe update your drivers , like in windows update>more>optional updates or so
Click to expand...
Click to collapse
That's the problem..
My drivers are up to date.. I can connect my other phone and this is no problem.
Just the A50 will not connected or detected by the pc.

Does the a50 charge and does the cable transfer data?

LR7875 said:
Does the a50 charge and does the cable transfer data?
Click to expand...
Click to collapse
The same cable works with the s20
And the A50 starts if I connect the cable.

No charge screen? Just straight boot to the Samsung screen and froze?

Straight to Samsung and than Downloader

LR7875 said:
No charge screen? Just straight boot to the Samsung screen and froze?
Click to expand...
Click to collapse
Need to make covid test BRB 30min 1h

Use other ports and/or charger

JuanTamqd21 said:
Use other ports and/or charger
Click to expand...
Click to collapse
As far as I know, the usb cable works flawlessly with a S20.

@Split1995 Please send me that what appears on the download mode screen.

LR7875 said:
@Split1995 Please send me that what appears on the download mode screen.
Click to expand...
Click to collapse
I've uploaded a screenshot at the Main Post of this Thread.
Odin Mode (AVB Fail)
Vbmeta Error verifying vbmeta xxxxx: OK_NOT_SIGNED (3)
CUSTOM VBMETA
VBMETA : No sign info
VBMETA .

Strange... Samsung phones have android vertified boot 2.0?

LR7875 said:
Strange... Samsung phones have android vertified boot 2.0?
Click to expand...
Click to collapse
Idk :-/

I Cannot Help You Fix Your Phone
Sorry
Samsung always does crap different. They integrated the nasty vertified boot but does not enable fastboot mode which allows disabling it. At least as far my knowledge reaches, your phone is just to me a fancy, glowing paperweight, although I know telling you that is heartbreaking.
Your options could really get up to:
Find, some other posts related, or senior members and developers who are helpful, or Google 'vertified boot Samsung bypass' as a last hope.
Define your A50 as obsolete, (maybe cry for your money then) sell it on ebay as 'parts / unfixable'. If you need the data protected, sell the body, screen, battery and dispose the motherboard in some known environmentally friendly way.
I don't recommend putting your hopes off, so I will provide some related posts from now on.
If you wanna get the data back, there is a (kind of hard) way to do it.
Unsolder your emmc chip and solder it onto a usb drive.
Also, replacing the EMMC storage chip may help as the corrupted data will be replaced, and maybe that is the answer of the problem but that requires high soldering skills which puts off most people.