yashsingh1/xdaforums huggingface dataset:
[Android Q&A, Help & Troubleshooting] assrcomputer:
hello .

first i downgrade to android 4 successfully then without flash repair bios

update with o t a zip file from recovery then when power off in recovery

tablet not turning on and not detecting in i ntel flash tool .

please help me !
[Android Q&A, Help & Troubleshooting] graphdarnell:
Being succinct where it's not warranted won't get you any help, I'm afraid. You need to tell every step that you've done. for instance, OTA zip for KK or LP? What did it say after the update, if anything? Two hundred and some pages make for a daunting task of reading, but you shouldn't jump the gun if you don't understand the risks you're taking. I'm sorry for what happened, but perhaps all is not lost. So tell your story in details.
[Android Q&A, Help & Troubleshooting] assrcomputer:
this is steps that i am do :

1. extract 4.4 official rom

2.replace TAB_S8-50LC_Otkat files

3.flash that with Intel Phone Flash Tool . (successful)

4.reset factory

5.update with ota android 5 file (S8-50LC_S000456_151016_ROW_WCC5) in recovery mod.(successful)

6.reboot in recovery mod.

7.tablet turn off and dead.

8.when i connect to pc not detect .
[Android Q&A, Help & Troubleshooting] Minto107:
Why didn't you let tablet do things on his own? You should use lenovo update app from settings and set update package to one you downloaded? It most likely failed to update bios and you're fd up
[Android Q&A, Help & Troubleshooting] graphdarnell:
I can't get the PC to see the files on the tablet except that Intel driver .msi. Changing mtp to anything else makes no difference. Have to do everything through TWRP. Anybody experiencing this or having a clue?
[Android Q&A, Help & Troubleshooting] sQt:
Hi i recovered full (TWRP) backup from working s8-50L so i will post it here (when i upload it.)

config partition hold imei nr so backup it before or dont flash
[Android Q&A, Help & Troubleshooting] Minto107:
[MENTION=4821597]social-design-concepts[/MENTION] anything new about CM14.1? Maybe there's something we can do to help you?

Wysłane z mojego Lenovo TAB S8-50LC przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] kmem:
This would be fantastic.
[Android Q&A, Help & Troubleshooting] Minto107:
Man, everything you've written here was already discussed million times :D just search the thread and you will find same guide :D anyway thanks for your effort in writing this [emoji14]

Wysłane z mojego Lenovo TAB S8-50LC przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] slimon:
Iam gonna admit . yes this method is very similar to what is written in comments . but believe me it is not

In other words . this will work for who cannot run s8 unlocked in fastboot starting ... Screen

? or maybe it written somewhere idk I stopped searching manually at page 150 ?
[Android Q&A, Help & Troubleshooting] gyb001:
Bootloader unlock

Hello.

Someone can upload the bios unlock ESP.img? The s8unlocker.zip isn't run on linux :(
[Android Q&A, Help & Troubleshooting] Minto107:
You can do it by urself ;) but when I'll have some free time I will try to provide you with this file ;)
[Android Q&A, Help & Troubleshooting] mothi01:
Cm 14.1

Any update about cm14.1..??? I'm eagerly waiting for this rom..
[Android Q&A, Help & Troubleshooting] Robalo:
Me too. Despite the time elapsed since S8-50 launch, it's hardware section is still good (and THE BEST I would say, considering the price) which at this point is wasted by the a terrible software.

There is nothing we need more than stable operating software.
[Android Q&A, Help & Troubleshooting] gyb001:
Linux install

Hello.

I'm trying install ubuntu for the tab.

I copied the ubuntu installer from the data partition, with adb. Partition type is vfat.

I run the installer grub from efi-shell. i'ts running fine, i can setting up localization, keyboard...

But it doesn't found the install media. The tablet detect the partition to ram. /dev/ram1,2...15 I'm trying mount it unsuccessfully.

I try load the driver, but it isn't help

Unfortunately the installer has minimal bash with busybox

Someone have idea how i mount the partition? Now the google isn't my friend. :(
[Android Q&A, Help & Troubleshooting] nocni:
Can someone upload recovery img of the tablet, if someone got backed up hole rom, i did install lolipop and kitkat couple of times but now i have problem, Boot failed – Efi hard Drive, i have problem with intel flash tool, its stuck on 66%, i know its driver problem but i canot fix it, i tried every driver instalation intel lenovo and every combination, but i can not fix it, i read that some people instaled temp bios and than temp cwm to install rom, i can do that(i tried it) but file that J0s3f uploaded is no longer online, so if somebody can upload their backup of the hole rom .
[Android Q&A, Help & Troubleshooting] Minto107:
If you can please post some instructions, I'm willing to do same on mine and I will troubleshoot it in a free time

If you have boot failed then you can't go into recovery. You should flash bios fix and then get back on KitKat and it will work just fine.

BTW guys my tablet is breaking down so I won't be able to help with new issues as well as I did now :D i don't know what will my next tablet be but I will let you know ;)
[Android Q&A, Help & Troubleshooting] nocni:
Found solution but it was epic fail marathon (trial on 2pc with diffrent os and specs), windows messed up drivers for adb and flash tool, to be short if you have same kind of problem (flash tool stuck during bios or kitkat update) uninstal all adb-usb drivers lenovo intel sony etc... restart pc and install FlashToolLite_5.4.2.0 , i tried older and newer version but for some reason for me this worked , when DnX USB Driver asked to be signed i decline it. Now like rest of you guys i am waiting to hear any news about nougat on our device, cheers.
[Android Q&A, Help & Troubleshooting] Minto107:
But how did you install Kitkat? You must do it via intel flashtool
[Android Q&A, Help & Troubleshooting] srinivas1:
do the update carefully, if it fails, it will result in...

dont mess it up, do carefully,if u mess up,ur device will keep flashing black screens and will not get recovered and recovery will be gone!

---------- Post added at 04:13 PM ---------- Previous post was at 04:09 PM ----------

how to fix bios?? plz send some instructions,my tabelt is messed up and i cant even start it, but after a couple of days it started when i plugged it on to pwer,then agian when my battery went down,it switched off and when i try to switch it on it doesnt and the screen starts flashing!! , when i try to go to recovery it says e;valid path not found,how do i fix this problem,plz telll me!!
[Android Q&A, Help & Troubleshooting] RaawrItsTomi:
Wow man, thanks! I didn't know the latest LP was rootable but it actually is. :laugh:

Edit: xposed is working perfectly aswell (https://xdaforums.com/showthread.php?t=3034811)
[Android Q&A, Help & Troubleshooting] Minto107:
Of course it would ;) MM and never requires SELinux changes to gain root but lollipop is just as easy as older releases ;) if you have access to recovery you can do anything you want(excluding flashing custom boot images)
[Android Q&A, Help & Troubleshooting] icanttinkofaname:
Hey everyone. I've been out of the xda community for a while, but I still run this tablet. Good to see people are still working on it!

I have had a new issue develop. I own a SanDisk memory stick https://www.sandisk.com.au/home/mobile-device-storage/ultra-dual-usb-drive-3 that worked perfectly for a while until I plugged it in yesterday and the tablet just switched off.

I unplugged it and started the tablet again. It all seems to be OK on the tablet, no weird bugs, except for the fact that it no longer recognises the USB stick. I've tried the stick in my laptop and another Android device and they pick it up just fine. What could have gone wrong?

The tablet charges just fine, so I'm not sure it's a hardware problem, but a software one. Is there a way to get it back working?
[Android Q&A, Help & Troubleshooting] kmem:
I remember seeing several people who had problems with sandisk microSD cards on the Lenovo forum a while back. I am not sure if they ever addressed the issue. I know this isn't particularly helpful but you may find more info over there.
[Android Q&A, Help & Troubleshooting] shadyy-007:
how to get back to stock rom of lenovo tab s8-50lc????

plzz ia am a beginner and I want to get it back to stock rom of lenovo tab s8-50lc...plzz I need the steps for it. :crying:
[Android Q&A, Help & Troubleshooting] droid_geek21:
Hello people.

Don't know if this thread is still alive or not. Anyway, I am having a huge problem with my S8-50LC. My phone was just randomly shutting down without any reason. Then I tried to flash a stock rom. The version was like s000200_150121. I successfully flashed the rom but after that, the tablet won't start. It starts and shows the Lenovo splash screen and then turns off. And it happens every time. Can't go to recovery and fastboot isn't working as well. So I tried to flash the KK file posted in this thread but this time, the phone won't even flash. Currently, it doesn't even show it's charging state. So, if I plug it into my computer via USB, the PC doesn't recognize the tablet as it just turns off. All the drivers are properly installed for Intel Flash Tool, Lenovo ADB drivers etc. If I try Vol+ and Vol- and power button combo, sometimes the fastboot turns on. Then I start the Flash tool to flash the room. But after executing Sleep for 40 seconds command, the tablet restarts and flash tool says the phone is disconnected. I tried to do bootloader recovery. But every time flash tool executes the Sleep for x seconds, the tablet doesn't work and turns off. The flash tool tries to partition, it fails. Is there any way to recover my tablet ever again?
[Android Q&A, Help & Troubleshooting] RaawrItsTomi:
First you need to use the bios_fix mentioned in earlier posts
[Android Q&A, Help & Troubleshooting] droid_geek21:
I couldn't find bios_fix in the thread unfortunately. Is the bios_fix the same as repair_bios file uploaded earlier in the thread? If yes, I managed to get the tablet into fastboot mode and the flash tool starts flashing. But as soon as it executes "Sleep for 25 Seconds" the phone restarts and then then shuts off. Flash tool starts partitioning command but fails.

Are these the correct files in the image?
[Android Q&A, Help & Troubleshooting] droid_geek21:
Maybe something is wrong with my device. After some unsuccessful tries, I managed to flash the stock rom. And it booted normally :D:D to the point it asked me to enter my time zone and then agree to the agreement. After that, suddenly the phone just shut down (direct blank screen off). Now, if I power on the phone, it just shows the Lenovo splash screen for 1 sec and immediately shuts off. Can't go to recovery either. What could be the problem behind this? Is this related to my motherboard?

One thing I want to mention is that during the flash I get this error, "Could not open /sys/devices/virtual/backlight". I get this several time during flashing.
[Android Q&A, Help & Troubleshooting] RaawrItsTomi:
Oh yeah I meant bios_repair.zip, my bad! I have no clue, my tablet never did anything like that. Also the "Could not open /sys/devices/virtual/backlight" is normal as far as I know.

If you somehow get to fastboot, you could try flashing the bios_repair again and then reflashing the KK and see what happens.
[Android Q&A, Help & Troubleshooting] icanttinkofaname:
I'm still stuck trying to get my SanDisk otg memory stick to work with my tablet. I mentioned it a few posts ago. Is there a Lenovo flash tool that I can use to refresh everything like drivers and Rom and stuff? I think a factory reset won't fix my driver issue.
[Android Q&A, Help & Troubleshooting] kmem:
I know it is a bit rude to ask but is SDC still trying to put together a cm based ROM? I remember reading that it was "mostly working" months ago. Sometimes weeks will go by without a post in here.

Is it time to give up on hope for anything newer than buggy lollipop with this well endowed but software deficient tablet? My phone's lineageOS ROM is leaps and bounds above marshmallow in every aspect. If any CM/lineage based ROM surfaced I would be ecstatic to test it out ?

Fogive me, I just am itching to get this thing a touch smoother. I hate to see it sit there neglected due to crappy software.
[Android Q&A, Help & Troubleshooting] Minto107:
I'm getting a secondary PC which will run Linux Ubuntu only. I will try my best to do at least something and just release a build even with some minor issues

Wysłane z mojego Lenovo TAB S8-50LC przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] kmem:
Thank you Sir!
[Android Q&A, Help & Troubleshooting] RaawrItsTomi:
Has anyone tried booting the Windows install with the latest LP ota? we could get further into the setup if they updated something related to the UEFI. (I would love to try but I don't have an otg cable or an USB hub)
[Android Q&A, Help & Troubleshooting] Vishnu Nampoothiri K:
No SIM connectivity (rolled back kitkat build s200_150121

i am not getting range for any sim in my tab after rolling back to kitkat yesterday. (I had previous experience experience, this was like,20th, rolling back) It used to work on both lollipop and kitkat until last day. And also , i am unable to add apn , due to "Unfortunately , settings has stopped working" on pressing save or back button after entering access point. :eek::rolleyes:
[Android Q&A, Help & Troubleshooting] icanttinkofaname:
Which temp root method did you use? T4 doesn't seem to work for me.
[Android Q&A, Help & Troubleshooting] RaawrItsTomi:
It worked just fine on T4 for me - even on the newest firmware
[Android Q&A, Help & Troubleshooting] icanttinkofaname:
I'm getting "E: no valid installer medium found" on the tablet when it reboots to fastboot. (Once I had "fastboot CMD waiting..." or something very similar to that) Even just a simple fastboot devices command returns nothing. the device just doesn't recognise commands/my win10 laptop once in fastboot. I can reboot normally and android runs fine, but I'm still without OTG. Anyone have any insight as to what's gone wrong?
[Android Q&A, Help & Troubleshooting] RaawrItsTomi:
Goodies for y'all

So I decided to give this tab another chance - I reflashed it and extracted some useful stuff for y'all;

Please note that all of these are fully working on S8-50F (the wifi only model). I didn't test other models

Stock recovery from lollipop (Version: S000456)

https://drive.google.com/open?id=0B1SfvXK9BKaTbkZidnYweExNdzQ

TWRP full backup of lollipop S000456 (it's fully reset so it'll take a while to boot up - give it at least 10 minutes!)

https://drive.google.com/open?id=0B1SfvXK9BKaTdDhTS1hRV3ZZVFU

TWRP full backup of lollipop S000478 (it's fully reset so it'll take a while to boot up - give it at least 10 minutes!)

https://drive.google.com/open?id=0B1SfvXK9BKaTR0tsS1k2ZkNJMkU

And since no one has uploaded a safe update zip to S000478 for S8-50F (I'm sorry if I missed a post), here's the S000478 TWRP update zip that won't reflash your bootlolader or your recovery:

https://drive.google.com/open?id=0B1SfvXK9BKaTWnZrYlAxVVE0S1U

MD5: 2a8ae3a7270e419d7e0c6baac685094a

I also tired to fix the sound distortion coming from the speakers with the flashable dolby zips with no luck. Can someone elaborate on how they fixed it?

Edit: The twrp backups could take a while to boot up for the first time since they're fully reset

Edit: oh there was a S8-50F S000456 twrp backup already... i didn't see it, sorry!

---------- Post added at 04:09 PM ---------- Previous post was at 03:59 PM ----------

Ohh! That's because you don't have the driver installed. Let me just find the post that shows exactly what to do

Edit: Can't find it, let me just put something together

First download the driver

https://androidfilehost.com/?fid=95916177934531193

Then follow this step by step

http://i.imgur.com/mHieTJ0.jpg
[Android Q&A, Help & Troubleshooting] kmem:
The post above is correct. This error indicates your system is lacking the driver. T4 will work once this is resolved.

---------- Post added at 07:33 PM ---------- Previous post was at 07:32 PM ----------

Thanks a bunch for the files! I will add these to my collection when I get to a decent connection.
[Android Q&A, Help & Troubleshooting] mac231us:
been away on other devices...glad to see folks still using this (don't want to give up my 50LC!)....noticed on 4pda some update this year! in Jan?

https://4pda.ru/forum/index.php?s=&showtopic=628319&view=findpost&p=60082716

the first step in the instructions says this (translated)

1. Download the update CC4_updatete_010417;

???!
[Android Q&A, Help & Troubleshooting] Minto107:
I'll give it a try since my tablet is useless due to damaged battery(still mad at Lenovo for this)

BTW great to hear from you again ;)
[Android Q&A, Help & Troubleshooting] icanttinkofaname:
Holy crap that's amazing! Thanks so much for your help. I had a feeling it was driver related but I couldn't find a solid source for the correct one I needed.
[Android Q&A, Help & Troubleshooting] RaawrItsTomi:
You're welcome :)

---------- Post added at 06:17 AM ---------- Previous post was at 06:16 AM ----------

Oh my god what? They released an update? Wow I thought the support for this device was dead

Edit: I inspected the update from 4pda.ru and here is my conclusion

The update is for S8-50LC -> it would probably work on 50F aswell but there are many useless files related to the modem

All of the preinstalled crapware has been removed

https://xdaforums.com/showpost.php?p=71804810&postcount=2653

If anyone's interested, i'll make an update zip just like i did with the S000478 so you can just update your existing version instead of reflashing the whole thing

And yes I'll make a TWRP backup aswell

Edit: didn't notice something
[Android Q&A, Help & Troubleshooting] Minto107:
You can do that of course ;) I'm on kitkat but as u said my tablet is trash and I will switch as I will have to give my builds a try(still waiting for my computer)

Wysłane z mojego Lenovo TAB S8-50LC przy użyciu Tapatalka
[Android Q&A, Help & Troubleshooting] RaawrItsTomi:
I'm on it

Edit: Extracted the system.img and compared it with S000478 (S8-50F). Here are the results: http://i.imgur.com/vebsOso.jpg

Approximately 8 files out of this system.img are updated. Two changes are related to the LC version of the tab (not updated). There are 65 items total that are changed.

That gives us an approximately 9,2% of updated files (which could actually be just slightly modified just like the rest - not updated).

The security patch "2017-04-01" is

bull crap

.

And yes I have a lot of free time in the evenings.
[Android Q&A, Help & Troubleshooting] Minto107:
Didn't you think it was just a joke as it was 1st of April? First thing that came to my mind was that it's fake and also it doesn't appear on Lenovo OTA at all so it must be fake
[Android Q&A, Help & Troubleshooting] RaawrItsTomi:
Actually no, i didn't... Well anyway I had fun decompiling it :D

Btw I'll be more than happy to do some testing with your own rom for you ;)

Edit: i thought someone was kind enough to *somehow* patch the files
[Android Q&A, Help & Troubleshooting] Minto107:
I'm happy to hear that ;) I think it's going to be long road to get LOS on this but let's hope for the best :D
[Android Q&A, Help & Troubleshooting] :
Is there any hope for my device I ran the s8 unlocker and this happened? What if I take my device to unnoficial/third party repair shops? Will it get fixed. As of now I can't even access the recovery / fastboot mode. ;_;

The errors are a bunch of gibberish but the endline is "Press ESC in 1 seconds to skip startup.nsh, any other key to continue."

Here is a picture of my device. imgur a/fRIST
[Android Q&A, Help & Troubleshooting] RaawrItsTomi:
Try accessing the intel dnx mode by holding both the volume up and volume down while starting up. From there you should be able to flash the bios_repair and then flash the KK rom :)

Edit: a side note - the s8 unlocker only works on lollipop S000456 firmware
[Android Q&A, Help & Troubleshooting] :
No luck with that method, I can access volume up + down just fine but when I start to flash the repair bios it heads straight for the shell line like my previous post. Looks like it's the end of the line for my device.
[Android Q&A, Help & Troubleshooting] Minto107:
Tell me more about what you did. All steps you followed that got you to that situation, I'm happy to help ;)
[Android Q&A, Help & Troubleshooting] Deadmon:
I had the same error (including booting straight to shell line). I resolved it by using a Windows 7 machine, Phone Flash tool, getting into Fastboot start, and flashing the official stock rom (the first rom in the OP).

Now I'm on LP, in the process of disabling bloatware.
[Android Q&A, Help & Troubleshooting] matomi:
Simply way to repair system, if don’t work anything only Fastboot mode...

I used it several times…

You will need:

- “Phone Flash Tool”

- “repair_Bios.rar”

https://drive.google.com/open?id=0B60lFoRGYQwOekl0UzYwZkZqY2M

- If you have own twrp backup, if don’t have then use this : “Lollipop TWRP backup S8-50F_S000456_151016_ROW”

http://xdaforums.com/show...&postcount=947

- “S8-50Tab_TWRP_recovery_V_POMoSH.exe”

https://uloz.to/!vSVO7yUJOmu9/s8-50tab-twrp-recovery-v-pomosh-zip

1. unzip "Lollipop TWRP backup S8-50F_S000456_151016_ROW" on to SD card to folder: \TWRP\BACKUPS\BaytrailCC13EC95\2017-04-18.my.recovery\

2. Insert SD card to tablet

3. "set fastboot mode" - connect tablet to PC, press holding both the volume up and volume down while starting up, (or disconnect USB, power on tablet, holding both the volume up and volume down and connect to USB

4. Load repair_Bios to tablet ()(see https://xdaforums.com/android/help/lenovo-tab-s8-50f-stock-firmware-rom-t2989791/post64068624#post64068624)

5. Tablet will jump to boot loader and waiting to command....

6. Run S8-50Tab_TWRP_recovery_V_POMoSH.exe and wait...

7. S8-50Tab_TWRP_recovery_V_POMoSH.exe finished, and next press volume down set "recovery mode " and press power reboot table. Tablet after few minutes start to TWRP

8. recovery system from SD Card
[Android Q&A, Help & Troubleshooting] Minto107:
You did it wrong... First dont use stolen recovery , use original one made by SDC from OP(really russians why do you have to stole and break everything) and don't use TWRP backup. Use stock kitkat firmware according to your variant. Then I can guarantee you that you'll do fine and it will work as new ;)

WysÅ‚ane z mojego Lenovo TAB S8-50LC przy uÅ¼yciu Tapatalka
[Android Q&A, Help & Troubleshooting] oggew2:
How is it going with this? DO yu have anything yet? Would really love to see a fresh new rom for my tablet :)
[Android Q&A, Help & Troubleshooting] kmem:
You and me both! Sadly, it seems that many of the users with the skills required to do this have lost interest. There are mentions in this thread of different people working on mm and now nougat but I haven't seen one test build. I haven't powered up mine in months.
[Android Q&A, Help & Troubleshooting] mac231us:
Lol...I powered it up updated some apps powered it down..was considering selling it but will not.. it is a great device in case of emergency need for a tablet phone and has a flash unlike most other tablets except those from Huawei and maybe Asus.. Halfway decent photos for a cheap device... Still on kitkat
[Android Q&A, Help & Troubleshooting] kmem:
I am in the same boat. I bought two of these for family members and one for myself thinking that with such impressive specs, surely dev support would follow. The family seems happen enough with the devices but I am not. I won't sell mine either but I do believe that it would get a lot more use if it had a half decent os implementation. KitKat is still on mine as well since lollipop seems to incur more issues. To me the os version isn't nearly as disheartening as the poor implemetation, i.e. lagginess, brightness issues, bloat, etc.

I will say though, watching videos on the tablet does work well. Nice screen for these old eyes and fantastic audio.