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[ TF300T ] How to unbrick when wrong recovery menu was flashed.

This is how I unbricked my TF300T that had no rom installed and a wrong bootloader/recovery combination. (4.2 bootloader with TWRP recovery JB version). Hope it helps.:good:
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I have the same on my TF300t and A700 - but it seems i just managed to get my TF300t back
i tried all fastboot (reflashing recovery, boot, system etc) no dice - especially since writing system was done after 3 secs all the time.
Here how i restored my TF300T JB
download your appropriate lates firmware from Asus (WW, US etc.) and extract the zip twice so you have your blob file
install your device drivers if needed (i used Google SDK ones) (and as a Tip Win8 sucks for Fastboot stuff so try to get Win7 Vista XP for this)
Reset your device with a paperclip/needle (about 2 cm down of your sdcard slot) and hold vol-down to enter fastboot
(the folowing i did at least 10 times already but didn't erase misc)
fastboot erase system
fastboot erase recovery
fastboot erase userdata
fastboot erase boot
fastboot erase misc
fastboot erase cache
fastboot -i 0x0B05 flash system c:\adb\TF300t\blob (this is my path - your's may vary depending where you stored your blob) ((also this was the first time i saw the loading bar while flashing)*
fastboot -i 0x0B05 reboot
* it also took a lot longer as it should:
C:\>fastboot -i 0x0B05 flash system c:\adb\TF300t\blob
erasing 'system'...
OKAY [ 1.695s]
sending 'system' (800935 KB)...
OKAY [133.121s]
writing 'system'...
OKAY [153.973s]
finished. total time: 288.789s
im now setting my tab up to get back to CM (which initially caused this sh1theap due to autoupdate error, same as my A700 got bricked )
hope i could help you out!
cheers
-Buster <----(credits to him) Go to this link ---> http://forum.xda-developers.com/showpost.php?p=44244313&postcount=12 because that's the guy that wrote this procedure from above (credits to him) :
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This part was me now -ozkrtech <--- (credits to me)
In addition to that, if you simply can't see your device using the command "adb devices" go check on device manager if you see a device called just "Transformer" with a yellow icon indicating it needs a driver, and manually update driver, select "browse my computer for drivers" and then select let me pick from a list of device drivers on my computer" there you will see a list of like 3 different drivers, one of them says "bootloader" and one of the others says "adb" (i think they self explain) but just in case try with each one of them you can keep on switching drivers until you get your device recognized by the command "adb devices".
You should be asking yourself... whats the right moment to do an "adb devices" command? well my tablet same as -Buster's tablet had the wrong recovery menu flashed (wrong bootloader version) and it just kept booting into the corrupted recovery (in my case TWRP) with the "can't mount anything" and "what's the password" issue. When you get to password screen just hit cancel and try the "adb devices" commando and you'll see it gets recognized with your device serial number.
Once your device gets recognized by "adb devices" command you will proceed to use "adb reboot-bootloader" command and the tablet will reboot into the menu that had 4 options but now have 3 options and its missing the fastboot option (don't panic) in the last bootloader it is auto-fastboot mode when you reach that screen with just 3 options in it now (yeah is the screen with the RCK option) at this point try "fastboot devices" command to see if your device gets recognized same as "adb devices" procedure, it should get recognized with a different serial number (don't know why, maybe that number isn't a serial number), at this time you are SO LUCKY! now you will follow what I posted at the beginning from that other dude ---> (-Buster) or follow his link --- > http://forum.xda-developers.com/showpost.php?p=44244313&postcount=12
And you'll have an unbricked tf300t in no time =) (I personally used the stock but newest Asus ROM) 4.2.1 (10.6.1.27.1) and it worked flawlessly.
**NOTE** don't turn off nor reset your device once you have formatted the partitions, no need for that (don't know what happends but it might get really hard bricked) just proceed to flash the stock rom after erasing the partitions.
I'm 100% positive this will work if your device is in same state as ours. (had TWRP for JB) then updated bootloader to version 4.2 and forgot to update twrp to version 4.2 or installed twrp version JB by mistake and lost fastboot and TWRP is asking password.
Hope it helps. Let me know your status and if it worked for you.

So I am in the same boat as I flashed the wrong twrp. My device shows up under adb devices and I can boot into the bootloader using adb reboot-bootloader. However, once there, I can not get the device recognized with fastboot. I have tried messing with the drivers like you suggested but nothing will get it to show up with fastboot. Anybody have advice on where to go from here?
So extra info. The device bootloops into twrp 2.6. The only way I can boot into fastboot mode is with adb reboot-bootloader and I can get into APX. I can also boot directly into my current ROM (Slim beta 3) by selecting android in the bootloader menu. I have tried flashing proper recovery through flashify, which is says was successful, but the wrong twrp never gets overwritten. Rebooting the device will send it back to twrp.
Thanks if anyone can help

Thanks, man! It took a while to find this thread, but this was exactly my problem. The adb driver in windows was the pre-solution to help get back to the fastboot server in the bootloader. Awesome information. Thanks again!

I have tried "adb reboot-bootloader" and then adb devices and fastboot devices and neither will show the tab listed while the tab reaches that screen with just 3 options. I have uninstalled reinstalled drivers, it does show in device manager as Asus Android Composite ADB Interface but when running the command it will not list the tablet. Any suggestions?

Hello!
A few days ago I tried to root my Asus TF300T because before that, I changed the lcd and the touchscreen from FPC-1 to G01 version. So I had to root and update touchscreen's firmware to 02-3011-4820.ekt. I already updated with last firmware from asus.com. First, I installed a TRWP recovery but was useless since the touchscreen doesn't worked. So I tried to rewrite CWM recovery. I reset it and I don't remember exactly if I begun to install or not CWM but when I tried to wipe data (Vol- + Power), the tablet has freezed. After a few minutes I did a hardware reset (pin hole). Since that, the tablet freeze with "Device Unlocked", Asus logo and nVidia. The device was already unlocked. I don't have any backup from it. No fastboot, no adb. Just APX mode. Is it possible to do something with it anymore? I tried BootTools2, extracted bloobs from last version of firmware, tryed to flash them with nvflash and wheelie but vainly. What is the next step? I'm a beginner!
Remember please I cannot go in fastboot recovery menu, only apx. Thank you in advance!

I can not thank you enough!!! my tablet is now working I honestly though it was done for aha THANK YOU!!!

Howdy, folks. I recently bricked my tablet thanks to a bad install of CWM, but following the OP's guide I was successfully able to reflash stock firmware and the device runs fine now.
However, upon reflashing said firmware, it became apparent to me (from reading various threads in the development subforum), that I would need to downgrade to an older firmware version to reflash TWRP. So I did that successfully, but now I am having a problem similar, or perhaps identical, to that of Bionicbowtieguy, in that ADB appears to be broken for my tablet. I have tried uninstalling and reinstalling the Asus usb drivers, in addition to reinstalling/updating all of the ADB software. Fastboot still works fine, but as such I'm unable to root using Motochop's rooting kit (I know there are other methods out there), nor am I able to flash a new recovery. I have also tried repeatedly reflashing the older stock in the hopes that ADB would magically start working again to no avail.
Does anyone have any suggestions to getting ADB to work for my tablet again? I have scoured the web, particularly these forums, for days looking for an answer, but haven't turned anything up yet. Any help would be greatly appreciated.

Gave back 10 years of my life that I lost once I discovered I flashed the wrong TWRP version. Can't thank you enough man.

Kombatant said:
Gave back 10 years of my life that I lost once I discovered I flashed the wrong TWRP version. Can't thank you enough man.
Click to expand...
Click to collapse
Same here!
Thank you OP for making this a topic even if you didn't come up with it you made it a thread that has saved a few people like myself money and headaches. Literally I just stumbled on this thread 10 minutes after I told my wife is be Tablet shipping Black Friday. Thank you sir.

Thank you.
I did this on a hackintosh running OSX since on Win 8.1 fastboot kept crashing.
March of this year I bricked my tablet during that 1 week period where nobody knew that TWRP was broken + fastboot freezing.
I must have tried everything, Maybe that erase misc was the key factor for success.
I was about to sell this for what I could get or send it to asus, now I can use it again!

How are you guys getting your tablet into fastboot mode? I've tried power on with volume down, the reset hole with volume down, and letting the battery die then recharge, then power on with volume down... Nothing. What am I doing wrong?
Sent from my Galaxy Nexus using Tapatalk

Best thread ever!! You are a life saver !!! thank you!!

leris2 said:
Best thread ever!! You are a life saver !!! thank you!!
Click to expand...
Click to collapse
Indeed. You are a god among men. Thank you so much

This worked! I thought I was out of luck. Thanks a lot.
I accidentally flashed an incomparable version of twrp. It would only boot straight into recovery and I couldn't get into recovery. TWRP kept asking for a password even though I never set one up and it wouldn't mount the internal storage or sd card.
I had to follow the instructions at the bottom to intall the drivers so adb and fastboot to work. After that I followed the instructions at the top.
The only thing different I did was skip the "fastboot erase boot" step. I was afraid that would really brick my device if I screwed up (Does this really erase the bootaloader leaving the device with no bootloader?).

Just wondering how long the fastboot window sits displaying < waiting for device > ? All my drivers are ok and I my pad shows up fine as a fastboot device in windows.
Cheers

Fastboot
Bolandk said:
Just wondering how long the fastboot window sits displaying < waiting for device > ? All my drivers are ok and I my pad shows up fine as a fastboot device in windows.
Cheers
Click to expand...
Click to collapse
They do not sit at all they will go right to it. You must not have the right combination yet. Keep trying.
Took me awhile to get the link.
norm883

FIXED!
BY GOD, I have no words for how incredible grateful I am right now! You not only saved my TF300T's life but also a lot of money for me and gave me another lesson of Android insight.
Thanks so much for this!
Let me know if I can return the favor somehow!
Regards,
(a very happy) philleicht

Hi. I think I'm having the same problem as some of the others in this thread.
Background: Tablet is unlocked, JB Rom (Paranoid Android) was installed since March, along with TWRP recovery. In preparation of installing CM11, I used Android Terminal Emulator to install the latest TWRP from a *.blob file, but I found that the latest TWRP is still not CM11-ready...
Setup to Issue: Last night, I decided I wanted to put CM11 on my TF300T. TWRP doesn't have a compatible recovery out for CM11 (install of CM11 rom fails every time), so I reinstalled the paranoid android ROM, and attempted to get the latest recovery from clockworkmod. On cwm's website, they only have choices for "transformer" "transformer prime" and "transformer infinity" which, when downloaded, have tf101, tf201, and tf700 in their filenames. (No tf300, that is)
So... I attempted to install the tf201 recovery (closest to mine, right?) by renaming the file cwm.blob, and using android terminal emulator to install it, the same way I did with TWRP. The first few times I tried and rebooted into recovery... TWRP was still installed... which was weird to me.
The big problem: Ultimately... when I rebooted the tablet, I just see the initial "ASUS" screen with "The Device is UnLocked." in the top-left corner. When I hold the power button to turn it off... it powers back on within a few seconds, and stays at the "ASUS" screen again. It will not stay off... and will not show anything but the "ASUS" splash screen. (With one exception, described later - "the only ray of hope...") If I hold the volume up or down buttons when powering on the device, absolutely nothing different happens. (since it doesn't STAY off... I've tried all kinds of different combinations of pushing/holding the appropriate buttons for when the tablet comes back on) IMPORTANT: I never see the "three icons" as expected when holding the volume button(s). No RCK, USB, etc... when the unit turns back on, it goes to the ASUS screen, and stays there until the battery dies. As a result... I can't get into recovery, fastboot, or APX or whatever in the traditional way.
Pressing the reset button alone, or reset + volume down has the effect of temporarily turning off the unit and then on again, the same as holding the power button to turn it off and letting it turn itself back on again.
The only ray of hope that I have is that *sometimes* if I press reset + volume up with the USB cable connected to a computer... the screen will STAY BLACK, but the "device connected" sound will play on my PC (Win 7 x64) as if I just plugged the tablet into USB on my computer, and I will get a message that it's trying to install an APX device. However, it eventually tells me that the device driver could not be installed. The screen on the tablet stays black in this case... until I reset it, hold the power button, etc.
So... I'm not opposed to (or unfamiliar with) using fastboot or any other command-line app to resurrect my tablet... I just haven't been able to get it into a condition that I can try something like that yet.
Is there any hope for my tablet? Somebody please help me. I'm open to sending a few bucks via paypal or google wallet to anyone that can lead me to a resolution. That would be cheaper than buying a new tablet... not to mention the priceless value of the progress I have in Fieldrunners 2. lol.
Thanks for your time!
~Ryan

same problem reboot back to twrp
well i may be stupid because i can't understand why i have tried a couple of commands and i still get the same problem reset volume down still goes back to twrp and ask for a password can someone please explain this in alittle more detail and what commands i also get the waiting for device in my commands is there another way to push these files into this device tf201 please help is there a way to do something in the twrp recovery like terminal command

I was a fool for flashing wrong recovery!
DrPhant0m said:
Hi. I think I'm having the same problem as some of the others in this thread.
Background: Tablet is unlocked, JB Rom (Paranoid Android) was installed since March, along with TWRP recovery. In preparation of installing CM11, I used Android Terminal Emulator to install the latest TWRP from a *.blob file, but I found that the latest TWRP is still not CM11-ready...
Setup to Issue: Last night, I decided I wanted to put CM11 on my TF300T. TWRP doesn't have a compatible recovery out for CM11 (install of CM11 rom fails every time), so I reinstalled the paranoid android ROM, and attempted to get the latest recovery from clockworkmod. On cwm's website, they only have choices for "transformer" "transformer prime" and "transformer infinity" which, when downloaded, have tf101, tf201, and tf700 in their filenames. (No tf300, that is)
So... I attempted to install the tf201 recovery (closest to mine, right?) by renaming the file cwm.blob, and using android terminal emulator to install it, the same way I did with TWRP. The first few times I tried and rebooted into recovery... TWRP was still installed... which was weird to me.
The big problem: Ultimately... when I rebooted the tablet, I just see the initial "ASUS" screen with "The Device is UnLocked." in the top-left corner. When I hold the power button to turn it off... it powers back on within a few seconds, and stays at the "ASUS" screen again. It will not stay off... and will not show anything but the "ASUS" splash screen. (With one exception, described later - "the only ray of hope...") If I hold the volume up or down buttons when powering on the device, absolutely nothing different happens. (since it doesn't STAY off... I've tried all kinds of different combinations of pushing/holding the appropriate buttons for when the tablet comes back on) IMPORTANT: I never see the "three icons" as expected when holding the volume button(s). No RCK, USB, etc... when the unit turns back on, it goes to the ASUS screen, and stays there until the battery dies. As a result... I can't get into recovery, fastboot, or APX or whatever in the traditional way.
Pressing the reset button alone, or reset + volume down has the effect of temporarily turning off the unit and then on again, the same as holding the power button to turn it off and letting it turn itself back on again.
The only ray of hope that I have is that *sometimes* if I press reset + volume up with the USB cable connected to a computer... the screen will STAY BLACK, but the "device connected" sound will play on my PC (Win 7 x64) as if I just plugged the tablet into USB on my computer, and I will get a message that it's trying to install an APX device. However, it eventually tells me that the device driver could not be installed. The screen on the tablet stays black in this case... until I reset it, hold the power button, etc.
So... I'm not opposed to (or unfamiliar with) using fastboot or any other command-line app to resurrect my tablet... I just haven't been able to get it into a condition that I can try something like that yet.
Is there any hope for my tablet? Somebody please help me. I'm open to sending a few bucks via paypal or google wallet to anyone that can lead me to a resolution. That would be cheaper than buying a new tablet... not to mention the priceless value of the progress I have in Fieldrunners 2. lol.
Thanks for your time!
~Ryan
Click to expand...
Click to collapse
I have exactly this! I hope someone knows the answer for this issue. Else the tablet will learn how to fly!
I tried to push the reset button as described earlier but nothing changes. Not able to go into recovery Just stuck at ASUS in the middle NVidia in the bottomright corner en upperleft corner 'this device is unlocked'

Lollipop OTA Failed Update!

Hi,
Last night google pushed out the Lolllipoop update to my phone. I have stock android, nothing is rooted or changed.
It downloaded the update, installed it and rebooted into a forever lasting startup animation.
After a night of this i tried to restart the phone, same situation as above.
I resorted to go into recovery mode and wipe the phone, get image of dead droid stating command not find.
Atleast bootloader works.
I use mac, im a bit geeky, but i have troubles find a good guide that lets me completely flash the phine back to 4.4 when you are in the situation of a halfass os on your phone.
HELP or at point to where i can complain to google

ropapa84 said:
Hi,
Last night google pushed out the Lolllipoop update to my phone. I have stock android, nothing is rooted or changed.
It downloaded the update, installed it and rebooted into a forever lasting startup animation.
After a night of this i tried to restart the phone, same situation as above.
I resorted to go into recovery mode and wipe the phone, get image of dead droid stating command not find.
Atleast bootloader works.
I use mac, im a bit geeky, but i have troubles find a good guide that lets me completely flash the phine back to 4.4 when you are in the situation of a halfass os on your phone.
HELP or at point to where i can complain to google
Click to expand...
Click to collapse
Long lasting boot animation means, it is call boot-loop. It happens to some people (including me) who upgraded to Lollipop. Try factory data reset using stock/custom recovery and see it is booting or not. It worked for me and some other people.
Factory data reset will erase all your data.
steps to boot in to stock recovery
1.Power off the Nexus 4.
2.Press and hold at the same time Volume Up, Volume Down and Power buttons.
3.When you’re at the Bootloader / Fastboot main screen press Volume Up until the Start text turns to Recovery mode.
4.Press Power to boot the Recovery Mode.
> shortly you will see a green Android laid on its back with a red exclamation mark.
5.Press and hold Power button and immediately press the Volume UP.
This will open the Stock Recovery mode of your Nexus 4.
You can download factory images for Kitkat 4.4 and Lollipop 5 from google website. Extract that file and you will find a file with the name Flash-All. Simply running the Flash-all script will erase all the contents in the phone. To avoid that, just remove the -w from the line
fastboot -w update ....zip
I hope this helps you!:good:

[resolved] Thanks
Thank you,
This should help people in the same situation. I did not manage to test your solution but the logic is there.
I found a toolkit for mac that rooted and installed kitkat 4.4.4. for me.
When google pushes lollipop again and if a boot-loop happens again, i will definitely give your method a go!
Thanks,
R

How to boot LG Leon into recovery?

I've successfully rooted my T-Mobile LG Leon, and I've successfully installed TWRP, but for the life of me, I can't get the phone to boot into recovery. I can RE-boot into recovery from TWRP manager, but I can't actually boot into it from a fully powered-down state. I've tried every combination of the power and volume buttons I can think of, and nothing ever works. Download Mode works, the factory restore menu works, but I CANNOT get into recovery. Is there a very specific set of instructions anywhere that I can follow?
EDIT: Okay, I finally figured it out: You need to actually select to do a factory reset, and it throws you into the recovery menu.

Yeah, it was because the stock recovery doesn't exist as a menu, when you're running stock and enter the adb command "adb reboot recovery" it will reboot to the "factory reset mode" and the actual file of this mode is stored on partition named "recovery". Choosing the factory reset option boots the custom recovery because it replaces the said " factory reset mode" and that's the trick.

You can access recovery from the powered off state by holding volume down and power on until you see the lg sign. Without letting go of volume down, depress on the power button before clicking it back in and holding both buttons in until you see twrp pop up.

If you reboot to recovery now, it''ll probally say secure booting error. Simply go to the Developer options and enable OEM Unlock and that'll make you boot to it

You boot in the download mode by holding the vol up 10 seconds and during this 10 seconds you insert the usb. The LG Leon brand screen will come on a minute then it will go into download mode. It says not to unplug until firmware is done updating. So I guess you should have your custom recovery or whatever before you do this. I have only got this far, and thusly it sits. All Dressd up with no where to go...haha

kruc Ire said:
You boot in the download mode by holding the vol up 10 seconds and during this 10 seconds you insert the usb. The LG Leon brand screen will come on a minute then it will go into download mode. It says not to unplug until firmware is done updating. So I guess you should have your custom recovery or whatever before you do this. I have only got this far, and thusly it sits. All Dressd up with no where to go...haha
Click to expand...
Click to collapse
can't find "enable OEM" at all in developer options. have phone hooked computer, and on, it's sending and receiving. No OEM. Isn't there.
See, I'm trying to root this without using KingUser. Since I found that it was pretty easy to do from the very beginning with Samsung, and I just don't see any way to do it here. I can't get ADB Devices command to see the phone.

kruc Ire said:
can't find "enable OEM" at all in developer options. have phone hooked computer, and on, it's sending and receiving. No OEM. Isn't there.
See, I'm trying to root this without using KingUser. Since I found that it was pretty easy to do from the very beginning with Samsung, and I just don't see any way to do it here. I can't get ADB Devices command to see the phone.
Click to expand...
Click to collapse
I think I have the same issue, but I rooted my phone using kingroot, I haven't tested the adb commands, I just want to use twrp but no luck, it says Secure booting error and I can't find OEM Unlock option in Developer Menu.

duffycop said:
I think I have the same issue, but I rooted my phone using kingroot, I haven't tested the adb commands, I just want to use twrp but no luck, it says Secure booting error and I can't find OEM Unlock option in Developer Menu.
Click to expand...
Click to collapse
I got a good way to get it rooted with SuperSU. Ran a command window script I found out there. It worked and now I have SuperSU root. I also figured out how to get into recovery. It looks as though my phone is not the standard LEON that people are talking about here. It's got a few designations, and the T Mobile site advertises a Leon that seems very similar and is called by the name most are using..
Anyhow my LG Leon is designated as a H320. It also carries a v10 desiganation, v10b. The v10 is variable from a-h or a-i. It would seem that once it is updated to 5.1.1 android it gets upped, and becomes unrootable. Mine being a v10b was rootable, but it took me a while to get used to it, and make the command window work.
Unfortunately for me one of many things I tried before getting it rooted, was ADB fastboot. And since this told me to wait for too long, I pulled the plug on it and pulled the battery to get back into "normal" operations. Perhaps I should have waited, because after finding out a few things about the phone, I discovered the true way to get it into recovery:
The real way into recovery for my phone, is to (from power off state) hold the volume up, a few seconds, then plug the USB cable which is going to the computer into the phone. While holding the volume up until it comes to recovery. This will activate the recovery, (Now for me it activates that fastboot command line...and does nothing else). This was the bit of information I could have used from the beginning, that no one knows. All these places tell you to hold the power and volume up, and then let off power when the screen changes, but that never worked even once. You just hold the volume, and plug the USB from computer. This works.
For me it goes into a "FASTBOOT" header at the bottom of the screen that never changes.
I believe it does this because of my unsuccessful attempt to fastboot it before. And it does not have the right driver to get recognized in the computer. So I'm screwed as far as the recovery goes now.
It is rooted though. And it doesn't seem to have any alternate ROMS available anyways. so we're dealing with the loss of the recovery.
When I do try to use an app such as TWRP manager or CWM (ROM) Manager to reboot into recovery, I get a "boot certification verification -1" error instead of the fastboot line at the bottom of the startup screen and it boots normally from there. So many people asked about this "boot certification verification -1" and NO answers are available anywhere online. So that's where it stands for this phone right now.
Anyone know what driver I should use to get the thing recognized in the computer? I have downloaded a zipped fastboot tools, and it won't get recognized inside the driver manager as "android" only as "unknown device" so I can't use that route....I'm thinking about doing a factory reset to try to erase the fastboot attempt. That may not help though. Anyone?

kruc Ire said:
I got a good way to get it rooted with SuperSU. Ran a command window script I found out there. It worked and now I have SuperSU root. I also figured out how to get into recovery. It looks as though my phone is not the standard LEON that people are talking about here. It's got a few designations, and the T Mobile site advertises a Leon that seems very similar and is called by the name most are using..
Anyhow my LG Leon is designated as a H320. It also carries a v10 desiganation, v10b. The v10 is variable from a-h or a-i. It would seem that once it is updated to 5.1.1 android it gets upped, and becomes unrootable. Mine being a v10b was rootable, but it took me a while to get used to it, and make the command window work.
Unfortunately for me one of many things I tried before getting it rooted, was ADB fastboot. And since this told me to wait for too long, I pulled the plug on it and pulled the battery to get back into "normal" operations. Perhaps I should have waited, because after finding out a few things about the phone, I discovered the true way to get it into recovery:
The real way into recovery for my phone, is to (from power off state) hold the volume up, a few seconds, then plug the USB cable which is going to the computer into the phone. While holding the volume up until it comes to recovery. This will activate the recovery, (Now for me it activates that fastboot command line...and does nothing else). This was the bit of information I could have used from the beginning, that no one knows. All these places tell you to hold the power and volume up, and then let off power when the screen changes, but that never worked even once. You just hold the volume, and plug the USB from computer. This works.
For me it goes into a "FASTBOOT" header at the bottom of the screen that never changes.
I believe it does this because of my unsuccessful attempt to fastboot it before. And it does not have the right driver to get recognized in the computer. So I'm screwed as far as the recovery goes now.
It is rooted though. And it doesn't seem to have any alternate ROMS available anyways. so we're dealing with the loss of the recovery.
When I do try to use an app such as TWRP manager or CWM (ROM) Manager to reboot into recovery, I get a "boot certification verification -1" error instead of the fastboot line at the bottom of the startup screen and it boots normally from there. So many people asked about this "boot certification verification -1" and NO answers are available anywhere online. So that's where it stands for this phone right now.
Anyone know what driver I should use to get the thing recognized in the computer? I have downloaded a zipped fastboot tools, and it won't get recognized inside the driver manager as "android" only as "unknown device" so I can't use that route....I'm thinking about doing a factory reset to try to erase the fastboot attempt. That may not help though. Anyone?
Click to expand...
Click to collapse
I dunno, I have the H340AR, with this phones happens the same that with the Samsung Galaxy Ace 3, there are, 3G versions, 4G versions, regional versions, etc.. GA3 have 7275R, 7275B, 7272L, 7272T, I dunno, maybe if we could get a device tree for a H340 and an H320 we could make some TWRP and CM compiling, but I just can't figure it out how to make a device tree or even where to begin..
I successfully rooted my H340AR with Kingroot, it works like a charm. I haven't tried fastboot and I tried to install TWRP in this link https://dl.twrp.me/c50/ but I get that F error "Secure booting error". I guess I have my bootloader locked, so I'm trying to figure out how to unlock my bootloader.
I'm trying to contact with some developers and see if anyone can help me build a device tree.

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Hi, I have that same phone H340AR LTE. I rooted it with Kingroot and also tried to use TWRP to gen into recovery and got that Security error. I only pulled out the baterry and turn it on again so it booted normally. I made a factory reset because I read that it could be a problem of OTA firmware update. Then I installed TWRP and BusyBox again and tried to get into recovery from TWRP option. When I did that, it showed up the Android lying in his back with a red triangle. I pulled a out the battery again and yes, it seems very dumb and simple but it worked and could reboot the phone.
However, I can't get into recovery from TWRP yet. I read that the problem with us not being able to unlock the bootloader(we don't have the OEM option) is because Leon has Lollipop 5.0.1 and OEM is for 5.1.1

pedrovay2003 said:
I've successfully rooted my T-Mobile LG Leon, and I've successfully installed TWRP, but for the life of me, I can't get the phone to boot into recovery. I can RE-boot into recovery from TWRP manager, but I can't actually boot into it from a fully powered-down state. I've tried every combination of the power and volume buttons I can think of, and nothing ever works. Download Mode works, the factory restore menu works, but I CANNOT get into recovery. Is there a very specific set of instructions anywhere that I can follow?
EDIT: Okay, I finally figured it out: You need to actually select to do a factory reset, and it throws you into the recovery menu.
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when i pressed factory reset all it did was to a factory reset even though i flashed twrp.img successfully... help?
lg leon h345 lollipop 5.1.1

This device has a locked bootloader. If you flash a custom recovery on it, it will not boot into recovery, but will report a security issue. You will lose all recovery functionality, including factory reset, adb, fastboot. If your phone fails to boot, you have a brick.

TWRP won't boot - Nexus 7 2012 wifi

Hi
I know this is an old device but I got it for free and feel it's a good device to experiment on. Looked thru all the posts I could pertaining to this but am not clear what to try next and wish to avoid bricking.
I have tried to flash various versions of TWRP and none will boot. Can still get into fastboot, device is recognized by adb. Says it is loading, but when I try to get to TWRP recovery I only get the exclamation point. I can get to the stock bootloader (is that right?) with Power+Volume up.
On power up it goes thru the Android startup but then I am presented with a screen asking for location, goes to WiFi step and hangs. No problem powering down and getting to fastboot.
What should I do next? My thought is to try and re-install factory image (have it) via directions here - https://forum.xda-developers.com/showthread.php?t=1781250
Any other suggestions?

This is great - I can answer my own post!
Digging around I read post for a Samsung Device having same problem. Solution was that the device would re-write the bootloader on reboot (the solution there was an option to not overwrite bootloader in Odin).
So instead of running 'fastboot reboot' I ran 'flashboot reboot-bootloader' and there was TWRP.

Ticwatch c2 stuck in boot loop after factory reset.

Hey all, I recently flashed a new rom on my phone, which required me to factory reset my ticwatch I'm order to reconnect.
Upon doing to the first time, everything seems to have gone well, but had trouble connecting to the device. So I ran another factory reset. Since that one, I've been stuck in a boot loop.
I see the "device software can't be checked for corruption" screen for about 20 seconds, and then it vibrates, screen turns off, then I see the same screen again. And so on.
I tried letting the battery go to nothing and trying again, seems to be the same issue. I'm letting it charge and bootloop for now in case maybe I just don't have enough juice to make it through boot.
It is rooted, with custom ROM (followed a guide on this forum somewhere about half a year ago, was running great) and TWRP installed (at least it was, I've been unable to get to the recovery screen since the boot loop started). Cannot see it in adb ever in this process.
Anyone have any other suggestions? I remember the Samsung notes had a special USB tool that would bridge a couple pins to immediately go to recovery, is there a similar option here?

Can you get in usb mode,or fastboot or recovery maybe?There is solution..dont worry.I ghuess adb dont work,but you cant go to fastboot mode and boot twrp image and get in twrp recovery..in twrp recovery you need backup file..If you cant do that,we are going to another solution..

Yeah, I can't - via any combination of button holding - get into any booted mode. No recovery, no fastboot, nothing. If anything, some buttons seem to make it circle boot faster .

nieminen432 said:
Yeah, I can't - via any combination of button holding - get into any booted mode. No recovery, no fastboot, nothing. If anything, some buttons seem to make it circle boot faster .
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Click to collapse
,Yeah tough situation,and when you connect it to pc in that "broken mode" -boot loop and open adb shell on pc ,comand adb devices or fastboot devices,does it show device?When you screwed boot and you have twrp there must be option to get in twrp.One trick more go to manage devices in pc find your device if unknown you right klick on it,update drivers,manually,and then choose android,then android adb install device.

KristijanKG3 said:
,Yeah tough situation,and when you connect it to pc in that "broken mode" -boot loop and open adb shell on pc ,comand adb devices or fastboot devices,does it show device?When you screwed boot and you have twrp there must be option to get in twrp.One trick more go to manage devices in pc find your device if unknown you right klick on it,update drivers,manually,and then choose android,then android adb install device.
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Click to collapse
I tried adb devices, but not fastboot devices, thanks for the idea, I'll give it a go.

nieminen432 said:
I tried adb devices, but not fastboot devices, thanks for the idea, I'll give it a go.
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Click to collapse
Maybe it wont work,but if doesnt,we figure out something..Bootlop is not the end of your device..

No go on either command. Nothing shows up.
I'm half wondering if it's my battery at this point. I think I'm getting a new watch for Christmas anyway, so not a huge loss. But happy to keep trying if anyone else has any ideas.