Lenovo TB-7304F (Tab 7 Essential) - stuck on boot - Android Q&A, Help & Troubleshooting

Afternoon
I have a Lenovo 7" tablet which is sticking on boot...to describe:
tablet off, charge screen working fine (green battery)
can get into menu to select fastboot mode or recovery
fastboot works, at least screen appears!
recovery shows dead android/no command screen - how to access recovery?
booting up, get inital orange logo then a 'bing' and start of boot but then freezes on the second logo
tablet not visible on PC, even in fastboot mode (have installed drivers)
I'm looking to get this going but am a bit stumped. I tried reinstalling firmware but can't get SPF Tools to work with any available scatter files; I would like to install TWRP (I found a potential image file on XDA) but can't do this until the PC recognises it....and I'm going round in circles now....any suggestions gratefully received. :good:

Update
OK, post was maybe a bit premature - I've kinda fixed my issues.
Managed to get into recovery after watching many videos (most of which were wrong, but hey-ho, got me on the right path!). At dead android screen, press and hold in power + vol up + vol down together (there is a bit of knack, turn it on its side with buttons facing up seems to be easiest) - this fires up the recovery screen (android standard recovery).
I managed to get over my bootloop issue by performing a data wipe/factory reset and cache wipe, then restarted fine.
As this was a secondhand tablet (my usual purchases - good condition bootloops!) - once it booted up I got into the set-up screens only to discover a Google lock issue. I ran the FRP unlock from here: https://androidfilehost.com/?fid=11050483647474832839 using the instructions from here: http://forum.gsmhosting.com/vbb/f958/lenovo-tab-4-7-essential-tb4-7304f-frp-remove-2322527/ (Voltrans second post, not the original one which has a 404 error on the download site). This removed the FRP lock straight off and now I have a functioning tablet.
I'm probably going to try getting custom recovery on so will see how that goes - I'll post back

and...that's all folks....
OK, despite finding a TWRP recovery online https://twrpbuilder.github.io/downloads/twrp/#441 and downloading it, can I get the fastboot unlocked? no.
Apparently Lenovo locked them all up and threw away the key, so nothing more can be done here.
I tried various iterations of fastboot oem unlock and fastboot flashing unlock, and nothing works, just get an error - and yes, I did put developer options on, OEM unlocking ticked and USB debugging active.... :silly:
So, unless someone can point me in a direction on how to unlock it - I've reached the end of the road with this one

Related

Bricked, am I still salvageable ?

There's a TL;DR at the end !
Hi - I hope you will be able to help me !
I have a XT910 Motorola Razr from Rogers in Canada.
I've had a Nexus S for a long time and I guess I wasn't prepared for a phone that wasn't as friendly to modding and flashing.
Before trying to flash a version of CM10 found here in the forums, I installed CWM Touch and made a nandroid backup - standard stuff.
What I didn't realize until it was too late is that booting into recovery DOES NOT boot CWM Touch - but rather the regular android one - the one that does not allow you to do much other than to factory reset.
I found out about RSD Lite but not until my battery wasn't charged enough and couldn't do anything about the phone.
I searched for the longest time on a LOT on different forums about how I could fix this and resorted to getting a factory cable - which works.
So, now, I can flash stuff using fastboot. Great, right ? Well, I still can't get things working.
RSD Lite doesn't detect my phone, and I believe that's because ADB doesn't detect it as well - so I tried that alternative way to flash fastboot files provided by the eternity project.
I've tried various fastboot packages but to no avail.
The best I can do is to get past the motorola logo - then black screen. Otherwise, I get boot or flash failures and get sent back to fastboot.
When the phone is on the black screen and that I plug a USB cable to my phone, Windows sees the device but it doesn't recognize it - I assure you I've tried all the different drivers to try and get it to work. Nothing.
Worth mentioning - I often get errors "Preflash validation failure" when trying to flash stuff.
I really feel I could fix this issue by flashing an IMG version of CWM touch or some other sort of recovery so that I can recover using a nandroid but they are no where to be found ! I can't believe that all recovery options are installed by APKs.
Any ideas ?
TL;DR, XT910 went boot looping after trying to flash CM10 - resorted to getting a factory cable and even then, can't get the phone back into working condition. Phone is detected by fastboot but not ADB.
Thanks !
first... the battery is the problem
this article can help...
How to Boot your Phone on Low Battery with Fastboot Flash Failure
To boot your phone on low battery where you get stuck on fastboot flash failure, hold down Volume Up and Volume Down then plug in “AC” USB charger to your Droid Razr. This will give you the bootloader menu upon where you can choose “Normal Recovery” to boot. If your phone doesn’t boot here, it will at least re-charge the battery normally instead of being stuck on fastboot flash failure which will re-charge your phone “very very slowly”.

Lenovo TAB S8-50F won't boot, help!

I'm not a n00b, I've rooted every Android device I've ever had, and I have my OnePlus Two running the latest CM14.1 nightlies. But I can not figure out what to do for this poor tablet.
I had downloaded and installed an OTA from Lenovo, but it must have been corrupt because the tablet got stuck in a boot loop. I can boot into recovery, so I tried formatting it and clearing all the caches, then it goes to a screen with a loading bar, which fills completely and just sits there. I've left the thing on all night. Nothing.
Sending it to Lenovo is a no-go because I voided the warranty when I rooted it.
I've also tried reinstalling the stock firmware, but the Intel phone flash tool either get's blocked by Windows 10 (with no way to whitelist it) or fails to flash properly.
crandroid99 said:
I'm not a n00b, I've rooted every Android device I've ever had, and I have my OnePlus Two running the latest CM14.1 nightlies. But I can not figure out what to do for this poor tablet.
I had downloaded and installed an OTA from Lenovo, but it must have been corrupt because the tablet got stuck in a boot loop. I can boot into recovery, so I tried formatting it and clearing all the caches, then it goes to a screen with a loading bar, which fills completely and just sits there. I've left the thing on all night. Nothing.
Sending it to Lenovo is a no-go because I voided the warranty when I rooted it.
I've also tried reinstalling the stock firmware, but the Intel phone flash tool either get's blocked by Windows 10 (with no way to whitelist it) or fails to flash properly.
Click to expand...
Click to collapse
What I've tried:
Just plain booting it - screen turns on and doesn't do anything, just black
Rebooting through recovery (power + vol_up) - plays boot animation, goes to a screen with a loading bar like it does after an update, but once the bar fills, a white line appears at the top of the screen and nothing happens
Downloading the official KitKat firmware (http://forum.xda-developers.com/android/help/lenovo-tab-s8-50f-stock-firmware-rom-t2989791), unarchiving the rar file and rearchiving it into a .zip, putting it on a MicroSD card, putting the card in the tablet, flashing through recovery - can't find the .zip, says SD card is blank
Clearing caches and wiping data - same as when rebooting through recovery
Using the Intel phone flash tool through bootloader (power + vol_down) - tool can't find device
Using the same tool through fastboot (power + vol_up + vol_down) - gets to the sleep 4000 ms step, reboots the device, then the device goes to the same loading screen and the flash tool can't contact it. I think it's trying to boot into the OS to finish the flash, but that's the problem to begin with
I've tried loading the temporary CWM session but that fails
I can't for the life of me figure out what the @bailka011 Unlock Tool is supposed to do or how to use it, plus the download link isn't working.
Can someone please guide my through this? I'm so confused
crandroid99 said:
What I've tried:
Just plain booting it - screen turns on and doesn't do anything, just black
Rebooting through recovery (power + vol_up) - plays boot animation, goes to a screen with a loading bar like it does after an update, but once the bar fills, a white line appears at the top of the screen and nothing happens
Downloading the official KitKat firmware (http://forum.xda-developers.com/android/help/lenovo-tab-s8-50f-stock-firmware-rom-t2989791), unarchiving the rar file and rearchiving it into a .zip, putting it on a MicroSD card, putting the card in the tablet, flashing through recovery - can't find the .zip, says SD card is blank
Clearing caches and wiping data - same as when rebooting through recovery
Using the Intel phone flash tool through bootloader (power + vol_down) - tool can't find device
Using the same tool through fastboot (power + vol_up + vol_down) - gets to the sleep 4000 ms step, reboots the device, then the device goes to the same loading screen and the flash tool can't contact it. I think it's trying to boot into the OS to finish the flash, but that's the problem to begin with
I've tried loading the temporary CWM session but that fails
I can't for the life of me figure out what the @bailka011 Unlock Tool is supposed to do or how to use it, plus the download link isn't working.
Can someone please guide my through this? I'm so confused
Click to expand...
Click to collapse
what did it says the update would do? android 6.0? latest update for this tablet was released 7 months ago... the unlock tool u mentioned unlocks the bootloader, and try to find a win7 pc to do the flashing. some users on a different forum stated that windows 10 will cause problems during flashing
good luck
xaocot said:
what did it says the update would do? android 6.0? latest update for this tablet was released 7 months ago... the unlock tool u mentioned unlocks the bootloader, and try to find a win7 pc to do the flashing. some users on a different forum stated that windows 10 will cause problems during flashing
good luck
Click to expand...
Click to collapse
This update was seven months ago. It did not claim to bring 6.0, just minor fixes.
Thank you for clearing that up, now I just have to figure out how to download and use it xD.
Also I have figured out how to enable the hidden administrator account in Win10 and use that to get around the security warning, still tries to boot partway through flashing. Unless there's some other part of Win10 that's disagreeing with it.
Sent from my ONE A2005 using Tapatalk
the same problem with me!
crandroid99 said:
What I've tried:
Just plain booting it - screen turns on and doesn't do anything, just black
Rebooting through recovery (power + vol_up) - plays boot animation, goes to a screen with a loading bar like it does after an update, but once the bar fills, a white line appears at the top of the screen and nothing happens
Downloading the official KitKat firmware (http://forum.xda-developers.com/android/help/lenovo-tab-s8-50f-stock-firmware-rom-t2989791), unarchiving the rar file and rearchiving it into a .zip, putting it on a MicroSD card, putting the card in the tablet, flashing through recovery - can't find the .zip, says SD card is blank
Clearing caches and wiping data - same as when rebooting through recovery
Using the Intel phone flash tool through bootloader (power + vol_down) - tool can't find device
Using the same tool through fastboot (power + vol_up + vol_down) - gets to the sleep 4000 ms step, reboots the device, then the device goes to the same loading screen and the flash tool can't contact it. I think it's trying to boot into the OS to finish the flash, but that's the problem to begin with
I've tried loading the temporary CWM session but that fails
I can't for the life of me figure out what the @bailka011 Unlock Tool is supposed to do or how to use it, plus the download link isn't working.
plz someone too guide me ,the same problem is happening but there is no appearance of a loading screen,when i switch on the tab ,it showws the lenova logo and goes to a black screen thats keeps on flahsing!! i dont knwo what to do ,when i connect to pc and try to flash it doesnt work,i dont what to do plz help me!!
Click to expand...
Click to collapse

Galaxy S6 Active stuck at No Command/Downloading

**The problem as it stands**
My Galaxy S6 Active is stuck in a sort of bootloop, except it never seems to attempt a boot. If it was turning on, without any combination of keys, it would go to the "No Command" screen. From there all I can do is force reset (power + volume down) to get it to restart to the same place or as it displays the Samsung splash screen, press volume up + power + home, it goes to the download screen. From the download screen, I can use my pc to flash a rom (that may not be correct) to the device and according to Odin, that is a success but my device freezes on "erasing".
Imgur album with pictures of the accessible screens (http://imgur.com/a/Rd9ND)
**Description of the problem when it was booting**
At seemingly random times, the device would freeze and the only way to get it to do anything was to reset it. Sometimes it would enter a bootloop but through key combinations, I would be able to get it out. One time after a bootloop, I had the sense to back up the device's storage, so luckily I have that.
**What I've done**
- I have tried wiping the storage in device recovery -- when it was accessible, I can no longer get to it.
- I have tried using Kies/Smart Switch emergency software recovery -- but when provided with the model name and serial number they would both crash.
- When the device booted, I tried using the standard recovery feature in Smart Switch. I can't remember the exact message but it was something along the lines of "This device does not support initializing"
- I have tried using Odin to flash ROMs (again, I may be using this incorrectly) to the device. I have only tried Samsung release ROMs, meaning ones that have not been modified by a 3rd party. I followed the second and third methods of a guide on XDA forums (https://forum.xda-developers.com/ga...e/downloading-flashing-att-galaxy-s6-t3260744). Odin never throws an error and it always says it was successful. During the device's initialization with this new ROM, it gets to 32% then goes to "Erasing". A few seconds later the animation freezes. I can leave the device here for hours but nothing happens. So I believe more than the animation is frozen.
- I tried using ADB recovery via the device's recovery mode (when it was accessible) but from what I can gather, Samsung uses a proprietary ADB interface that would not work with what I was trying to do (I was following method 3 of the previously mentioned guide (https://forum.xda-developers.com/ga...e/downloading-flashing-att-galaxy-s6-t3260744). I would always get a message saying "ADB server out of date".
I may have done more than that but that's what I can recall.
Any help would be appreciated. Even if you know of a better place to post this, let me know.
Thanks
My s6 active did the same thing on 08/24/17. I have not yet found a solution.

Is my device fully bricked? [Samsung Galaxy Tab A 8.0"]

Hello. I have tried to install a custom recovery (TWRP) on my Samsung Galaxy Tab A 8.0" (SM-T290) today, however, it has not exactly gone to plan. I will run over exactly what I did, and what troubleshooting steps I have taken so far.
I downloaded this version of ODIN: https://forum.xda-developers.com/t/patched-odin-3-13-1.3762572/
I unlocked the bootloader through the bootloader menu and enabled USB debugging after the tablet had turned on.
I downloaded and used the latest .md5.tar TWRP file from here: https://forum.xda-developers.com/t/...-2-for-2019-galaxy-tab-a-8-0-sm-t290.4185235/
ODIN Successfully flashed TWRP and the device rebooted. I attempted to get straight into the recovery by holding volume up, however, the screen remained black.
The tablet now cannot boot into recovery, download mode, etc, and only the backlight of the screen turns on. The tablet does eventually "boot up" and give the little vibration, at which point my computer recognises it, but I cannot see any files on the tablet. I can also see the tablet with ADB using the command "adb devices", however it tells me the tablet is "unauthorized", meaning I cannot use any ADB commands to attempt to reboot into recovery, download mode, etc.
I have tried disconnecting the battery and just powering on with the cable to no avail. I am assuming the device is fully bricked at this point, however, I would be appreciative if any possible solutions could be suggested, and if where I went wrong can be pointed out so I do not make the same mistake in the future.
Thanks in advance.
It's always risky to apply mods.
To get rid off of all mods you applied re-flash tablet's Stock ROM.
If this doesn't work for you then take it to authorized service center and let them try to fix it.
jwoegerbauer said:
take it to authorized service center and let them try to fix it.
Click to expand...
Click to collapse
They never fix anything. The only thing they do is charge you an absurd price and replace the motherboard or the entire tablet.
I'm on the same boat. Tablet can't get into download mode, just shows "This device has unauthorized software on it and is locked". Tried all possible button combinations to no avail.
SmiffyJ said:
Hello. I have tried to install a custom recovery (TWRP) on my Samsung Galaxy Tab A 8.0" (SM-T290) today, however, it has not exactly gone to plan. I will run over exactly what I did, and what troubleshooting steps I have taken so far.
I downloaded this version of ODIN: https://forum.xda-developers.com/t/patched-odin-3-13-1.3762572/
I unlocked the bootloader through the bootloader menu and enabled USB debugging after the tablet had turned on.
I downloaded and used the latest .md5.tar TWRP file from here: https://forum.xda-developers.com/t/...-2-for-2019-galaxy-tab-a-8-0-sm-t290.4185235/
ODIN Successfully flashed TWRP and the device rebooted. I attempted to get straight into the recovery by holding volume up, however, the screen remained black.
The tablet now cannot boot into recovery, download mode, etc, and only the backlight of the screen turns on. The tablet does eventually "boot up" and give the little vibration, at which point my computer recognises it, but I cannot see any files on the tablet. I can also see the tablet with ADB using the command "adb devices", however it tells me the tablet is "unauthorized", meaning I cannot use any ADB commands to attempt to reboot into recovery, download mode, etc.
I have tried disconnecting the battery and just powering on with the cable to no avail. I am assuming the device is fully bricked at this point, however, I would be appreciative if any possible solutions could be suggested, and if where I went wrong can be pointed out so I do not make the same mistake in the future.
Thanks in advance.
Click to expand...
Click to collapse
Hi,
I have the exact same problem, did you manage to recover the tab?
Thanks heaps

Question Bootproblem and how go back to the standards

Dear Community,
I am a real noob when it comes to Android, flashing ROM, root and so on.
I got a Oneplus here where supposedly root rights are on it and another ROM.
Current problem, as soon as I turn it on it hangs when booting. (Bootloop - red dot with 2 running white dots)
I already tried it with power + volume+. Unfortunately unsuccessful.
Is it correct when I press Power + Volume- that you get into fastboot?
I can't get into the recovery mode either.
I would like to get the device running, but without root rights, OEM lock and the Oxygen OS from Oneplus.
So far my attempts to get it running have been unsuccessful.
Update: after 4h in the bootloop, it booted successfully. *yeah*
So how i can see, if the phone is rooted and how can i lock it?
I tried it with adb, i can find the phone with adb devices.
Then adb reboot fastboot, after that i tried to find it with fastboot devices but then he finds nothing more. the drivers are installed. also fastboot oem lock doesnt work, because the phone is not found.

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