[Q] OEM Android Tablet Unable to boot - Android Software/Hacking General [Developers Only]

Hi,
Im hoping someone can help me, I have been given a OEM tablet from where I work. I think its an unbranded Coby Kryos 7022, this the closest resembulance.
I installed clockworkmod from the android store to backup the rom, but when I rebooted, the clockmod loaded (IMG 1) and doesnt allow me to do anything, if i select reboot the device reboots back the clockworkmod. So Im stuck in this loop. Clockwork also wont mount the sdcard.
I have the Android SDK installed and followed a guide to replace the recovery.img but when it comes to replacing it i get error -1, im also unable to su in adb shell....
I did manage to get the device in to fastboot i think. As the screen was black and windows tried to load drivers but was unable to find them.
I have tried adb devices but get waiting for devices and fastboot devices and get nothing. I'm guessing i haven't got the right drivers for this device in whatever state its currently in. I have tried googles android composite adb driver with no success.
any help is appreciated
unable to post image

Related

[Q]LG P880 stuck on boot

Hello!
Today I decided to root my LG P880 (Optimus 4X HD) and get in trouble.
What I did to get in trouble?
I looked at the google how to root my phone and found one way. I downloaded zip folder and extracted it on my desktop then in my phone got at the recovery menu apply update from ADB and run on my desktop bat file. All was okey restarted my phone and got superuser icon. Next I tried to put clockworkmode on my phone I think by this turtorial (I have checked so many topic I am not 100% sure) http://forum.xda-developers.com/showthread.php?t=2298420 Then I got problem.
Problem:
I am stuck at the boot where LG logo appears and keep loading for ever.
I guess problem is that I did not research enough and didnt unlock bootload before putting CWM. Could it be the problem and how to solve it?
What I have tried:
Ofcourse I tried to make bootload unlock, root again, install another CWM nothing helped I wiped cache and all data I restarted phone and pc. As I understood to make bootload unlock I have to do something with adb. I downloaded it and extracted ADB folder and disk C and Opened it with CMD. What is interesting almost none of ADB commands dont work I keep getting error: closed after almost all commands like: adb, shell, adb reboot, adb usb etc. I tried to adb kill-server and start it all over again nothing helped but adb devices command work and it found my phone. I am not 100 % sure but those commands when I tried to do CWM worked fine (I put link how I tried to make CWM some lines up)
su
cat /mnt/sdcard/recovery.img >/dev/block/mmcblk0p1
sync
but when I tried to do this again I cant do it
I am using windows 8.1 btw
Maybe I can flash basic rom or something to make my phone work again? Looking forward to some suggestions

[Q] No ADB Interface in device manager

Hello. After doing some things in TWRP I got stuck in a boot loop. I wiped all storage so that I could just sideload a ROM, but I can't sideload because ADB is not working properly. I've installed Android SDK and the drivers for my phone, however no ADB commands would work. I decided to attempt to update the drivers but going into device manager shows that there is no Android ADB Interface like usual. Help please?
ItsGflow said:
Hello. After doing some things in TWRP I got stuck in a boot loop. I wiped all storage so that I could just sideload a ROM, but I can't sideload because ADB is not working properly. I've installed Android SDK and the drivers for my phone, however no ADB commands would work. I decided to attempt to update the drivers but going into device manager shows that there is no Android ADB Interface like usual. Help please?
Click to expand...
Click to collapse
Put the phone in download mode and re-flash the firmware using LG-Flash tool. I've been there and the driver resolution issue on anything above Windows7 didnt work. Even the Adb Sideload.

Need help recovering phone!

I'm in way over my head guys, so here's my situation:
I have no OS installed, for some reason I can't get into TWRP anymore (it goes to eRecovery instead).
I CAN get to bootloader screen (bootloader is unlocked).
adb does not recognize my device on device list command (it worked before, but now I can't get into the OS to turn on USB debugging and such...).
please help! I don't know what else to do!
liran96 said:
I'm in way over my head guys, so here's my situation:
I have no OS installed, for some reason I can't get into TWRP anymore (it goes to eRecovery instead).
I CAN get to bootloader screen (bootloader is unlocked).
adb does not recognize my device on device list command (it worked before, but now I can't get into the OS to turn on USB debugging and such...).
please help! I don't know what else to do!
Click to expand...
Click to collapse
I think the first step to fixing my phone is to get it recognized in the list of devices attached in adb.
how do I go about doing that?
In device manager I got it to recognize my phone as Android Phone > Android ADB Interface.
so I believe the drivers are updated, what else can I do to get my phone recognized in cmd adb?
If I need to provide any more details then please say, I am getting hopeless
Edit: I managed to get into TWRP. still no clue how to continue from here as I can't transfer any files from PC
I found a update.zip file on my phone's SD card, I can't remember which ROM version it holds, but when I try to flash it I get a few errors:
check_write_data_to_partition,write data error
E:unknown command [errno]
Update_huawei_pkg_from_ota_zip: update package from zip failed
Updater process ended with ERROR: 7
Error installing zip files '/external_sd/update.zip'
I think I managed to screw my phone up even more, I can no longer get into TWRP...
:crying:

bricked shield?

hi guys,
i my shield is stuck on the nvidia logo when booting normally, if it brings up the bootloader, it shows unlocked but hitting continue caused it to freeze on the screen, recovery freezes on nvidia logo and fastboot protocol just brings it back to this screen. i orginally installed twrp and it confirmed successful flash of new os .... on reboot it bricked to its now state, i cant get into twrp or get my pc to see it to install a new copy
anyone got any ideas
thanks
@Fairmax don't click continue, it freezes because there is nothing to continue to, as long as you can enter bootloader your device isn't fully bricked. So, to fix your problem you will have to download official ROM from nvidia's site (https://developer.nvidia.com/shield-open-source find your model and click recovery images).
When you download latest ROM unzip it and follow the textual guide, but, there will be one file missing (i can't remember which one, user data maybe or something like that), don't worry and just continue with the next step. After you flash just reboot to system by holding power button. Good luck !
i cant seem to get it to be recognised by windows all i get is this-- Windows has stopped this device because it has reported problems. (Code 43) A request for the USB device descriptor failed.--
trying to install nvidia usb driver via have disk bring up an error that the file is not usable with x64 system
ok after many driver reinstall iv got device manager to say android adb interface but still not showing on on device list in cmd
Fairmax said:
ok after many driver reinstall iv got device manager to say android adb interface but still not showing on on device list in cmd
Click to expand...
Click to collapse
Which command did you type in?
fpozar said:
Which command did you type in?
Click to expand...
Click to collapse
adb devices shows no devices
i tried the 3 different option in the driver install which was android adb, bootloader, and something else and nothing shows in devices. i tried it on my laptop and a different cable and cant get adb to list the device :crying:
Fairmax said:
adb devices shows no devices
i tried the 3 different option in the driver install which was android adb, bootloader, and something else and nothing shows in devices. i tried it on my laptop and a different cable and cant get adb to list the device :crying:
Click to expand...
Click to collapse
Well of course adb devices shows no devices because you are not actually in adb mode, you are in the bootloader mode. Just download minimal fastboot and adb, install it and extract recovery image into the folder where you installed minimal adb and fastboot (you don't need any other drivers).After you did this and your device is in bootloader and connected, click on the path in your fastboot & adb folder and delete everything and type cmd. No need to do adb devices, just proceed with fastboot flash ...
fpozar said:
Well of course adb devices shows no devices because you are not actually in adb mode, you are in the bootloader mode. Just download minimal fastboot and adb, install it and extract recovery image into the folder where you installed minimal adb and fastboot (you don't need any other drivers).After you did this and your device is in bootloader and connected, click on the path in your fastboot & adb folder and delete everything and type cmd. No need to do adb devices, just proceed with fastboot flash ...
Click to expand...
Click to collapse
ah now that makes sence....silly me i dont do this very often . so fastboot saw device and iv uploaded all parts of the recovery image and rebooted but it is still stuck on the nvidia logo, that was the original file so now il try 5.2.0 and see if that works
Fairmax said:
ah now that makes sence....silly me i dont do this very often . so fastboot saw device and iv uploaded all parts of the recovery image and rebooted but it is still stuck on the nvidia logo, that was the original file so now il try 5.2.0 and see if that works
Click to expand...
Click to collapse
You can also try flashing twrp and then lineageos or something from twrp.
fpozar said:
You can also try flashing twrp and then lineageos or something from twrp.
Click to expand...
Click to collapse
good news after a few hours of trying (usb dropped connection a few times then battery died) it finally works again .....been over 2 years since iv had this shield running after nvidia did the recall , now goto put a different rom on there so it dosnt update and kill itself
Hello I had a similar issue with my k1 tablet and ended up flashing factory images via adb fastboot and all flashed fine. Now my tablet is stuck on the boot screen with the green and white nvidia logo. How long does it take to boot please?
I have same issue too. I can load TWRP and flash the other partitions but TWRP shows un-mountable partitions and even a full stock ROM flash will not allow it to boot. I have a similar issue with a recall tablet. what did you do to fix it?

ASUS TF201 - issues getting any OS to boot (though TWRP works fine).

Hello folks.
In my months-long quest to avoid turning an ASUS TF201 tablet into e-waste ...
I've searched, searched again, searched some more, and while I've found answers (none of which have worked), a lot of them seem to be dated, or depend on files that are no longer available for download, so I turn to you for suggestions.
Current state:
The tablet will not boot Android.
TWRP works fine.
The problem(s):
I am unable to flash the device with ASUS' official firmware. TWRP returns an error when the ASUS firmware runs its "checks," then fails.
I have tried Chrombi-KK, following the directions step by step, but a few strange things occur:
1. When flashing through TWRP (.zip images sitting on an SD card), everything completes with no errors, but on reboot, the tablet displays its ASUS logo, but does not boot into Android. I let it sit there for three hours today, and it just sat there, displaying the logo.
2. When trying to flash from ADB (TWRP update for example), it sits there endlessly at "< waiting for any device >". This is odd, because ADB's "reboot" commands works fine.
Now, I'm at a loss. The hardware seems fine, but I'm stuck ... and this is after months of trying, giving up, trying again etc.
Is this a lost cause?
Any help at all would be much appreciated. I've tried so many things, so many online "solutions," to no avail. So I turn to the experts as my Hail Mary pass before sending this to the eco centre.
Thanks for reading, and hopefully ... just maybe ... someone will have the magical set of instructions to get this thing working again.
The only command to verify whether an ADB / Fastboot connection got successfully established is
Code:
adb devices OR fastboot devices
The command
Code:
adb reboot
simply in Android's system file called build.prop (re-)sets flag ro.bootmode to normal what is read by bootloader when Android boots up.
jwoegerbauer said:
The only command to verify whether an ADB / Fastboot connection got successfully established is
Code:
adb devices OR fastboot devices
The command
Code:
adb reboot
simply in Android's system file called build.prop (re-)sets flag ro.bootmode to normal what is read by bootloader when Android boots up.
Click to expand...
Click to collapse
As it turns out, I had already stumbled upon your your "ADB-FASTBOOT-Installer" during a trip down one of the many rabbit holes trying to get this tablet working again.
adb devices returns:
List of devices attached​0123456789ABCDEF recovery​
adb reboot restarts the tablet, which I assume means the ASUS tablet driver is working.
I can't seem to do anything else with adb, however, such as push a new TWRP version, etc. This may be a key point, as it seems likely the version I have of TWRP may be too old to support upgrade using something like Chrombi-KK.
Is this a likely theory?
I would re-flash phone's Stock ROM to get rid off of all mofications applied so far to check for phone is working as expected.
NotTheLips said:
Hello folks.
In my months-long quest to avoid turning an ASUS TF201 tablet into e-waste ...
I've searched, searched again, searched some more, and while I've found answers (none of which have worked), a lot of them seem to be dated, or depend on files that are no longer available for download, so I turn to you for suggestions.
Current state:
The tablet will not boot Android.
TWRP works fine.
The problem(s):
I am unable to flash the device with ASUS' official firmware. TWRP returns an error when the ASUS firmware runs its "checks," then fails.
I have tried Chrombi-KK, following the directions step by step, but a few strange things occur:
1. When flashing through TWRP (.zip images sitting on an SD card), everything completes with no errors, but on reboot, the tablet displays its ASUS logo, but does not boot into Android. I let it sit there for three hours today, and it just sat there, displaying the logo.
2. When trying to flash from ADB (TWRP update for example), it sits there endlessly at "< waiting for any device >". This is odd, because ADB's "reboot" commands works fine.
Now, I'm at a loss. The hardware seems fine, but I'm stuck ... and this is after months of trying, giving up, trying again etc.
Is this a lost cause?
Any help at all would be much appreciated. I've tried so many things, so many online "solutions," to no avail. So I turn to the experts as my Hail Mary pass before sending this to the eco centre.
Thanks for reading, and hopefully ... just maybe ... someone will have the magical set of instructions to get this thing working again.
Click to expand...
Click to collapse
ok, so good thing is twrp boots, now again if you have box with wich the tablet come try to get correct model number and search for official frimware to flash through adb using flashall.cmd
again, if official rom is not installing don't worry flash THIS custom rom using TWRP make sure to wipe all before flashing.
jwoegerbauer said:
I would re-flash phone's Stock ROM to get rid off of all mofications applied so far to check for phone is working as expected.
Click to expand...
Click to collapse
As I mentioned: "I am unable to flash the device with ASUS' official firmware. TWRP returns an error when the ASUS firmware runs its "checks," then fails."
This is exactly what I'm trying to find a solution on how to do.
[email protected] said:
ok, so good thing is twrp boots, now again if you have box with wich the tablet come try to get correct model number and search for official frimware to flash through adb using flashall.cmd
again, if official rom is not installing don't worry flash THIS custom rom using TWRP make sure to wipe all before flashing.
Click to expand...
Click to collapse
Yes, thank goodness it's not completely bricked, haha.
I think the version of TWRP that's on there may be too old, and I'm having trouble pushing a newer version through ADB ... so this is the current hurdle I'm trying to overcome.
Might you happen to have a link to the ASUS TF201 drivers known to work in Windows 10, so I can rule that out? If I can't get ADB to push a newer TWRP version from Windows, I may give it a go in Linux too ... but I'm trying not to open up new avenues of complexity, so I've restricted all my efforts to Windows as that's where most of the online help I can find tends to take place.
Thanks!
Edit: Unfortunately, the download link to [ROM][N 7.1] KatKiss Nougat [TF201] no longer works:
404 Not Found
This has been another constant obstacle, i.e., recommended files to download are no longer available.
NotTheLips said:
As I mentioned: "I am unable to flash the device with ASUS' official firmware. TWRP returns an error when the ASUS firmware runs its "checks," then fails."
This is exactly what I'm trying to find a solution on how to do.
Click to expand...
Click to collapse
Nobody needs TWRP to re-flash a device's Stock ROM.
It's typically done via ADB Sideload method.
NotTheLips said:
Yes, thank goodness it's not completely bricked, haha.
I think the version of TWRP that's on there may be too old, and I'm having trouble pushing a newer version through ADB ... so this is the current hurdle I'm trying to overcome.
Might you happen to have a link to the ASUS TF201 drivers known to work in Windows 10, so I can rule that out? If I can't get ADB to push a newer TWRP version from Windows, I may give it a go in Linux too ... but I'm trying not to open up new avenues of complexity, so I've restricted all my efforts to Windows as that's where most of the online help I can find tends to take place.
Thanks!
Edit: Unfortunately, the download link to [ROM][N 7.1] KatKiss Nougat [TF201] no longer works:
404 Not Found
This has been another constant obstacle, i.e., recommended files to download are no longer available.
Click to expand...
Click to collapse
how you tried to flash stock rom, i mean do you boot into fastboot after booting into twrp or not?
jwoegerbauer said:
Nobody needs TWRP to re-flash a device's Stock ROM.
It's typically done via ADB Sideload method.
Click to expand...
Click to collapse
As I mentioned before, "2. When trying to flash from ADB (TWRP update for example), it sits there endlessly at "< waiting for any device >". This is odd, because ADB's "reboot" commands works fine."
[email protected] said:
how you tried to flash stock rom, i mean do you boot into fastboot after booting into twrp or not?
Click to expand...
Click to collapse
I've tried two methods.
The first is to try to flash it from TWRP, but this fails with an error. The stock ROM appears to be checking for dependencies, and it fails this check.
The second is to use ADB (fastboot) while the tablet is sitting in TRWP. It stalls at "< waiting for any device >".
So this the problem. Neither of those two methods work for the stock ROM.
With a third party ROM, TWRP appears to flash the device successfully (no errors or stalls). When I reboot the device, it will not boot Android, and gets stuck at the ASUS boot logo indefinitely.
I'm not sure what do next to get past these two problems.
NotTheLips said:
I've tried two methods.
The first is to try to flash it from TWRP, but this fails with an error. The stock ROM appears to be checking for dependencies, and it fails this check.
The second is to use ADB (fastboot) while the tablet is sitting in TRWP. It stalls at "< waiting for any device >".
So this the problem. Neither of those two methods work for the stock ROM.
With a third party ROM, TWRP appears to flash the device successfully (no errors or stalls). When I reboot the device, it will not boot Android, and gets stuck at the ASUS boot logo indefinitely.
I'm not sure what do next to get past these two problems.
Click to expand...
Click to collapse
here is the problem, ok so follow the steps carefully,
boot into twrp
then connect your phone to your pc
type "adb devices",
if some thing like 1234567890 -recovery shows up proceed else start-over,
after successfully detected by adb typed "adb reboot bootloader"
then after booting into fastboot mode type "fastboot device"
if something shows up proceed else tell me
make sure you have installed adb and fastboot properly,
after all this run the cmd file in stock rom, to automatically flash it.
[email protected] said:
here is the problem, ok so follow the steps carefully,
boot into twrp
then connect your phone to your pc
type "adb devices",
if some thing like 1234567890 -recovery shows up proceed else start-over,
after successfully detected by adb typed "adb reboot bootloader"
then after booting into fastboot mode type "fastboot device"
if something shows up proceed else tell me
make sure you have installed adb and fastboot properly,
after all this run the cmd file in stock rom, to automatically flash it.
Click to expand...
Click to collapse
Here's what happened:
C:\Windows\system32>adb devices​List of devices attached​0123456789ABCDEF recovery​​C:\Windows\system32>adb reboot bootloader​​C:\Windows\system32>fastboot device​< waiting for any device >​​It sits at < waiting for any device > indefinitely, until I reboot the device.
NotTheLips said:
Here's what happened:
C:\Windows\system32>adb devices​List of devices attached​0123456789ABCDEF recovery​​C:\Windows\system32>adb reboot bootloader​​C:\Windows\system32>fastboot device​< waiting for any device >​​It sits at < waiting for any device > indefinitely, until I reboot the device.
Click to expand...
Click to collapse
the problem is your pc does not have adb and fastboot properly installed
try this one https://forum.xda-developers.com/t/tool-minimal-adb-and-fastboot-2-9-18.2317790/
also, use this official driver https://www.asus.com/SupportOnly/Eee_Pad_Transformer_Prime_TF201/HelpDesk_Download/
if your pc is 64 bit use win764bit version
NotTheLips said:
Here's what happened:
C:\Windows\system32>adb devices​List of devices attached​0123456789ABCDEF recovery​​C:\Windows\system32>adb reboot bootloader​​C:\Windows\system32>fastboot device​< waiting for any device >​​It sits at < waiting for any device > indefinitely, until I reboot the device.
Click to expand...
Click to collapse
This "waiting for device" problem happens when the USB device node is not accessible to your current user. The USB id is different in Fastboot mode, so you can easily have permission to it in ADB but not in Fastboot.
Each manufacturer implements Fastboot differently. So, if not already done yet, download and install the suitable "Android USB Driver" provided by ASUS. Then Fastboot should work.
BTW: Your device actually stucks in recovery mode.
Is OEM Unlock got enabled in Android settings? If not, Fastboot never will work.

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