[Question] Zuk Z2 Pro Can't boot into Fastboot/Bootloader - Lenovo Zuk Z2 Pro Questions & Answers

Hi guys,
I just got my Z2Pro and trying to unlock bootloader.
After the command:
adb reboot bootloader
The phone restart with the following screen:
(I can't embed the images propertly, please see attachments).
I can use the volumns key and power button to select,
But selecting Fastboot just restathe phone and get back to the same screen above.
Did I get the lemon?
Any ideas?
Thanks,

My mistake
The screen I saw was the fastboot screen.
I just did not have the right driver on pc to recognised it.
I installed the driver from post #2 of
****://zukfans.eu/community/threads/howto-flash-a-stock-zui-rom-zuk-z2-pro-z2121-only.57/
And it allowed me to go on and unlock the bootloader.
Cheers.
t_c1 said:
Hi guys,
I just got my Z2Pro and trying to unlock bootloader.
After the command:
adb reboot bootloader
The phone restart with the following screen:
(I can't embed the images propertly, please see attachments).
I can use the volumns key and power button to select,
But selecting Fastboot just restathe phone and get back to the same screen above.
Did I get the lemon?
Any ideas?
Thanks,
Click to expand...
Click to collapse

Related

Unlocking (oem unlock) the Nexus One !without! power button

Hello,
Is it possible to unlock the Nexus One without having a working power button?
The step before entering "fastboot oem unlock" in your adb shell, you have to select "fastboot" in the default stock bootloader on your N1. But you've to select "fastboot" with the power button.
Without unlocking the device, I'm not able to flash custom bootloaders (like Black Rose), am I?
Any ideas how to manage this problem?
Thanks in advance!
Domskibus said:
Hello,
Is it possible to unlock the Nexus One without having a working power button?
The step before entering "fastboot oem unlock" in your adb shell, you have to select "fastboot" in the default stock bootloader on your N1. But you've to select "fastboot" with the power button.
Without unlocking the device, I'm not able to flash custom bootloaders (like Black Rose), am I?
Any ideas how to manage this problem?
Thanks in advance!
Click to expand...
Click to collapse
I think you can but you have to root your phone first with the bootloader locked and install custom ROM with the option to boot the phone to bootloader and then do the oem unlock via fastboot without shutting the phone off. And I am sure you know how to do the battery trick to recharge your phone, right?
It won't help you. Command "adb reboot bootloader" will take you straight to fastboot from absolutely any ROM, including stock, but you'll have to press Power button to confirm your choice to unlock bootloader - and voila, you have no power button.
I´m in same problem.
I also had this problem once, this is what I found:
Common Instructions
If you need to restart the phone, its impossible to do so, since the power button is broken.In such a scenario, follow this
a)Connect the phone to a charger/USB.
b)Remove the battery from the phone once you see the charging light on the phone
c)Insert the battery and keep it there until you see the charging light again.
Continue doing steps b) and c) until the phone boots (Phone normally boots in 4 attempts).
[Update]
It is required that the phone be fully charged in order to complete the steps correctly.A phone shutting off in between an upgrade/flashing due to low battery is sure to brick.
Click to expand...
Click to collapse
Please, before posting more or less useless posts, consider re-reading the title of the thread, and then re-reading this:
Jack_R1 said:
It won't help you. Command "adb reboot bootloader" will take you straight to fastboot from absolutely any ROM, including stock, but you'll have to press Power button to confirm your choice to unlock bootloader - and voila, you have no power button.
Click to expand...
Click to collapse
Hi Domskibus,
you don't need to unlock your device to flash BlackRose! I didn't unlock mine, too!
yxcv99 said:
Hi Domskibus,
you don't need to unlock your device to flash BlackRose! I didn't unlock mine, too!
Click to expand...
Click to collapse
This is correct. For flashing BlackRose only root is required, AFAIK. Possibly not even that. The exact requirements are stated in BlackRose thread.

[Q] Totaly bricked?

@alray
i did search arround, but haven't found nothing similar with my problem..
i able to recover a phone if i cannot enter in fastboot or recovery. in bootloader it works but it freezing in the moment i push power button to choose fastboot or recovery. also it doesn't boot normal-> it's starting, showing the "htc powered by android" screen then goes off.
mention: in the bootloader is no "Active CMDline overflow" message.
only thing i'm interested if it's possible recover from this.
bodom[prodigy] said:
@alray
i did search arround, but haven't found nothing similar with my problem..
i able to recover a phone if i cannot enter in fastboot or recovery. in bootloader it works but it freezing in the moment i push power button to choose fastboot or recovery. also it doesn't boot normal-> it's starting, showing the "htc powered by android" screen then goes off.
mention: in the bootloader is no "Active CMDline overflow" message.
only thing i'm interested if it's possible recover from this.
Click to expand...
Click to collapse
try this: http://forum.xda-developers.com/showthread.php?t=2739126
if you're S-Off and it doesn't work then you need to downgrade hboot first. if you are S-On and it doesn't work, then
stuck at 1st step.. "fastboot devices", nothing listed.
i have drivers instaled, also the Universal Adb Driver. what am i missing? if i try the to flash anyway the recovery it says <wait for device>
bodom[prodigy] said:
stuck at 1st step.. "fastboot devices", nothing listed.
i have drivers instaled, also the Universal Adb Driver. what am i missing? if i try the to flash anyway the recovery it says <wait for device>
Click to expand...
Click to collapse
try faq#2: http://forum.xda-developers.com/showpost.php?p=52135024&postcount=2
EDIT: you are in bootloader right? FASTBOOT USB (in red)
oh nooo... if i would be in fastboot usb i wouldn't ask for help..
it's in bootloader where i have to choose between
fastboot
recovery
factory reset
...etc
and here, if i choose any of above it is freezing, with the option i choosed highlighted. that's all
but as far as i know.. even in this stage, i mean in bootloader where am i, if i type fastboot devices should see the device.no?
bodom[prodigy] said:
oh nooo... if i would be in fastboot usb i wouldn't ask for help..
it's in bootloader where i have to choose between
fastboot
recovery
factory reset
...etc
and here, if i choose any of above it is freezing, with the option i choosed highlighted. that's all
but as far as i know.. even in this stage, i mean in bootloader where am i, if i type fastboot devices should see the device.no?
Click to expand...
Click to collapse
you need to select "fastboot" using the power button, to get to FASTBOOT USB
nkk71 said:
you need to select "fastboot" using the power button, to get to FASTBOOT USB
Click to expand...
Click to collapse
i can select fastboot, but when i press power button, the bootloader freeze. it does not enter in FASTBOOT USB.neighter in recovery or any of the options of the bootloader. it's freezing with the option highlited after i press power button. after the freeze, only thing i can do is to keep power button+volume down, to restart to bootloader, where again, if i choose any of the options, it freeze again. also doesn't boot in normal mode, it's just showing the "HTC powered by android" then goes off.
bodom[prodigy] said:
i can select fastboot, but when i press power button, the bootloader freeze. it does not enter in FASTBOOT USB.neighter in recovery or any of the options of the bootloader. it's freezing with the option highlited after i press power button. after the freeze, only thing i can do is to keep power button+volume down, to restart to bootloader, where again, if i choose any of the options, it freeze again. also doesn't boot in normal mode, it's just showing the "HTC powered by android" then goes off.
Click to expand...
Click to collapse
what hboot are you on? 1.44?
unplug the cable,
force reboot,
select FASTBOOT,
when it shows FASTBOOT (in red),
plug the cable to your computer, and it should change to FASTBOOT USB
.
1.57,
it remains highlithed in blue. it freezes highlighted in blue.
there you got it. i recorded what happens, if you have patience 2-3 mins.
ignore the cracked screen, i disassambled the phone to disconnect the battery, in hope of something would work after.. and did not matter for me if that i damaged it, i have new full housing with touchscreen for it.
https://www.youtube.com/watch?v=thNiKBSYsQc&feature=youtu.be

huawei honor 6x BLN-L21C185B361 twrp gets overwritten by stock need help

hey guys this is my first time making a thread in this is im really sorry if i posted in wrong place.
ok when i follow any guide to root my phone and before i need twrp and twrp doesn't wanna get installed on my phone for some reason u guys might help me
ok after unlocking bootloader i use adb to install the twrp and this is what i do
1pen cmd in adb folder and type "adb reboot bootloader" and it opens bootloader
2:then i place the recovery in same folder and name it recovery and type following command "fastboot flash recovery recovery.img" after this it says okay
3:then i reboot using adb or manually with phone with any kind of way to get into recovery first i see this stupid message "the bootloader is unlocked you can't be trusted"
4: 1)then it says press volume up to enter erecovery 2)press power button to continue and 3rd) "if no option has been selected the phone will boot automatically" or something like that
whatever option i choose i either endup in stock erecovery or boot the phone.
im so frustrated that i wanna throw the phone outa window please help...
honor 6x BLN-L21C185B361
Hi,
I can understand your frustration. You can use two methods:
01- Switch off phone. Press Volume Up and Down buttons together and Press and hold Power Button for 3-5 seconds. Phone will boot and take you to TWRP.
02- Instead of using buttons, use "adb reboot recovery" it will take you to TWRP.
Regards,
Aero
Aerocaria said:
Hi,
I can understand your frustration. You can use two methods:
01- Switch off phone. Press Volume Up and Down buttons together and Press and hold Power Button for 3-5 seconds. Phone will boot and take you to TWRP.
02- Instead of using buttons, use "adb reboot recovery" it will take you to TWRP.
Regards,
Aero
Click to expand...
Click to collapse
Now i adb commands stopped working idk why
My phone also has the same problem ،
I waited for the battery to finish. Then, with a chance to connect the charger cable and playing with the buttons, I was able to enter the main rom
plz help me . How can I fix the boot loader?
Is it possible to install the original ROM on the bootloader again?

Asus k013 stuck on boot.

Please excuse my lack of knowledge I am a complete beginner.
My wife left her working Asus k013 (do not know which model as I no longer have box) on charge over night, next day it would no longer get beyond the boot screen. We are stuck with the Asus Logo and the revolving boot start symbol.
I have tried the start/volume up and start/volume down options to do factory reset but just returns to the boot start. If I hold the buttons down for a long time it just shuts down. I them tried downloading 'clear data' to sd card but this presumably requires the tablet to boot before it works.
I have purchased a new tablet for her so I do not want to send the tablet for repair but would really like to get it working as spare and to experiment with rooting etc. to try an improve my knowledge.
If you boot with Power + Volume Down (stop pressing power once the backlight turns on, but keep pressing Volume Down) does it boot into the Droidboot screen (with NORMAL BOOT, RECOVERY MODE buttons)?
Asus k013 stuck on boot
lambdadroid said:
If you boot with Power + Volume Down (stop pressing power once the backlight turns on, but keep pressing Volume Down) does it boot into the Droidboot screen (with NORMAL BOOT, RECOVERY MODE buttons)?
Click to expand...
Click to collapse
Thanks for trying but this still ends up trying to do a normal boot without completeing
593jim said:
Thanks for trying but this still ends up trying to do a normal boot without completeing
Click to expand...
Click to collapse
Did you install the Lollipop (Android 5.0) update on it when it was still working or were you still on KitKat (Android 4.4)?
Asus k013 stuck in boot
lambdadroid said:
Did you install the Lollipop (Android 5.0) update on it when it was still working or were you still on KitKat (Android 4.4)?
Click to expand...
Click to collapse
Not sure which release it is on. Received an OTA a while ago from the original when bought.
Upgrade was not recent so do not think that's it unless the OTA was done last weekend.
593jim said:
Not sure which release it is on. Received an OTA a while ago from the original when bought.
Upgrade was not recent so do not think that's it unless the OTA was done last weekend.
Click to expand...
Click to collapse
Huh, well. Do you get a "Fastboot starting..." screen if you press Volume Down + Volume Up + Power while turning the tablet on?
lambdadroid said:
Huh, well. Do you get a "Fastboot starting..." screen if you press Volume Down + Volume Up + Power while turning the tablet on?
Click to expand...
Click to collapse
Great we have a start, doing as you said has brought up 'Fast boot starting' then 3 lines #1, #2, #3 but does not move from there.
Thanks for your help so far, how do I proceed please.
Regards,
Jim
593jim said:
Great we have a start, doing as you said has brought up 'Fast boot starting' then 3 lines #1, #2, #3 but does not move from there.
Thanks for your help so far, how do I proceed please.
Regards,
Jim
Click to expand...
Click to collapse
Download http://dlcdnet.asus.com/pub/ASUS/EeePAD/ME176C/UL-K013-WW-12.10.1.36-user.zip.
Install ADB+Fastboot on your PC. There are various guides available online for this, so you should google or take a look at https://wiki.lineageos.org/adb_fastboot_guide.html
Boot into that mode again and connect the tablet to your PC (via USB). On a command prompt, verify that...
Code:
fastboot devices
... displays a device. Extract "droidboot.img" from the ZIP you've downloaded in the first step, then run:
Code:
fastboot boot droidboot.img
Does it now show the "NORMAL BOOT" etc screen?
Asus k013 stuck on boot
lambdadroid said:
Download http://dlcdnet.asus.com/pub/ASUS/EeePAD/ME176C/UL-K013-WW-12.10.1.36-user.zip.
Install ADB+Fastboot on your PC. There are various guides available online for this, so you should google or take a look at https://wiki.lineageos.org/adb_fastboot_guide.html
Boot into that mode again and connect the tablet to your PC (via USB). On a command prompt, verify that...
Code:
fastboot devices
... displays a device. Extract "droidboot.img" from the ZIP you've downloaded in the first step, then run:
Code:
fastboot boot droidboot.img
Does it now show the "NORMAL BOOT" etc screen?
Click to expand...
Click to collapse
Sorry so long to get back, I got help from a friend over the weekend but we did not succeed.
Had another go today and got to normal boot. Tried to go to recovery and got failed. Volume down offers 'power off' 'recovery' and restart bootloader.
I have attached a screen shot, the last line shows
E: No valid installer medium found.
I seem have a problem with the files I downloaded to my computer have the 'user/adb-fastboot/' file but cannot find the bring up the tools extention.
Regards,
Jim
Asus k013 stuck on boot
593jim said:
Sorry so long to get back, I got help from a friend over the weekend but we did not succeed.
Had another go today and got to normal boot. Tried to go to recovery and got failed. Volume down offers 'power off' 'recovery' and restart bootloader.
I have attached a screen shot, the last line shows
E: No valid installer medium found.
I seem have a problem with the files I downloaded to my computer have the 'user/adb-fastboot/' file but cannot find the bring up the tools extention.
Regards,
Jim
Click to expand...
Click to collapse
Sorry, should have added 'Fastboot device' no longer works.
May need to go back to my friend for help.
Can't see how to attach the photo.
Regards,
Jim
593jim said:
Sorry so long to get back, I got help from a friend over the weekend but we did not succeed.
Had another go today and got to normal boot. Tried to go to recovery and got failed. Volume down offers 'power off' 'recovery' and restart bootloader.
I have attached a screen shot, the last line shows
E: No valid installer medium found.
I seem have a problem with the files I downloaded to my computer have the 'user/adb-fastboot/' file but cannot find the bring up the tools extention.
Regards,
Jim
Click to expand...
Click to collapse
Sorry, this might have been confusing but I didn't post all needed steps yet. I just wanted to make sure you actually get to the droidboot screen.
Since you managed to get there, this is what I recommend: Use https://forum.xda-developers.com/android/development/intel-android-devices-root-temp-cwm-t2975096 on the "NORMAL START, RECOVERY MODE" etc screen to get into a temporary recovery session. For this tablet you should use trigger T4 and TWRP portrait. Copy the UL-K013-WW-12.10.1.36-user.zip you already downloaded to a external SD card first.
Once you are in recovery, you can try flashing the ZIP. This might restore your system to a usable state.
As for fastboot devices not showing any device: On Windows you may need to install the right USB drivers to make it work properly. You can try the Universal ADB drivers available from https://adb.clockworkmod.com/ or the USB driver provided by ASUS http://dlcdnet.asus.com/pub/ASUS/EeePAD/ME176C/ADB_driver.zip. I cannot help you with this because I'm not using Windows much myself.
Hi. I'm also k013 user, same problem. Stuck on fastboot starting ... Fastboot starting ...#1 fastboot starting ...#2 fastboot starting ...#3.
I also tried "fastboot boot droidboot.img" in cmd but my k013 reboot back into fastboot starting ... Fastboot starting ...#1 fastboot starting ...#2 fastboot starting ...#3.
Can you help me in this?
Tia
---------- Post added at 06:46 AM ---------- Previous post was at 06:40 AM ----------
Hi. I'm also k013 user, same problem. Stuck on fastboot starting ... Fastboot starting ...#1 fastboot starting ...#2 fastboot starting ...#3.
I also tried "fastboot boot droidboot.img" in cmd but my k013 reboot back into fastboot starting ... Fastboot starting ...#1 fastboot starting ...#2 fastboot starting ...#3.
Can you help me in this?
Tia

cannot enter fastboot mode

Hi, there.
I need help, please .
I cannot enter fastboot mode in realme x2 pro CN ver.
Does anyone have the same thing ?
I tried the following 2 .
Press and hold volume up + power button*
adb reboot fastbootloader
Fastboot screen will be displayed for a moment, but normal reboot will be done immediately.
nabetch17 said:
Hi, there.
I need help, please .
I cannot enter fastboot mode in realme x2 pro CN ver.
Does anyone have the same thing ?
I tried the following 2 .
Press and hold volume up + power button*
adb reboot fastbootloader
Fastboot screen will be displayed for a moment, but normal reboot will be done immediately.
Click to expand...
Click to collapse
Lol you need the bootloader unlocked i thing, and for enter press and hold vol- and power
Enviado desde mi RMX1931 mediante Tapatalk
Sergiocubano1 said:
Lol you need the bootloader unlocked i thing, and for enter press and hold vol- and power
Enviado desde mi RMX1931 mediante Tapatalk
Click to expand...
Click to collapse
That's honestly one of the most useless answers I've read here.
To even be able to unlock the bootloader, you HAVE TO enter the fastboot mode and he cannot. So what you'r saying doesn't make any sense. Like at all.
I do have the same btw and I'm running out of ideas, so if anyone actually has something helpful to say I'd be very thankful.
Neither the button combo nor the adb reboot bootloader does work. I can see the fastboot screen for like half a second and then it reboots normally without even touching the device.
Edit: I just found a way to enter fastboot on my realme X2 Pro.
You have to click on "Start in depth test" on the official Realme App, which can be found here: https://c.realme.com/in/post-detail...64863306907648&subForumId=1197159778845982720
I totally forgot the last setp before actually unlocking the bootloader..
Root after relocking bootloader
Hi, after having relocking bootloader the root is it keep and is it possible to continue to use rooted applications ? Thank's !
Idou77 said:
Hi, after having relocking bootloader the root is it keep and is it possible to continue to use rooted applications ? Thank's !
Click to expand...
Click to collapse
No, and before relocking bootloader, if your not "completely stock", you can brick your device.
lutherkingmartin said:
No, and before relocking bootloader, if your not "completely stock", you can brick your device.
Click to expand...
Click to collapse
Thank you for your answer. Is it true that unlocking the bootloader causes problems with the camera and the fingerprint sensor ?
In my case, only problem with FP, camera was ok.
lutherkingmartin said:
In my case, only problem with FP, camera was ok.
Click to expand...
Click to collapse
Ok thank you again for all those informations ?
..
i stuck in recovery mode bootloop but my device cannot go to recovery ,, after 3 seconds it continue to off and on again ,, cannot go to fastboot mode too..
i using vol - + and power button ,,, the device detected as MTKXXXX ,,, my device is realme 3 ,,
after detected cannot send command with: adb
or fastboot ,, are you have any solution?
I can't enter fastboot in realme x2
Hiii there
I can't enter fastboot in realme x2 it just shows for 2 to 3 sec them reboot normal
What to do
I need help
Help me out
Thanks
Same problem here, i see the bootloader screen for a split second before it boots into RUI all by itself. It's so annoying.
nabetch17 said:
Hi, there.
I need help, please .
I cannot enter fastboot mode in realme x2 pro CN ver.
Does anyone have the same thing ?
I tried the following 2 .
Press and hold volume up + power button*
adb reboot fastbootloader
Fastboot screen will be displayed for a moment, but normal reboot will be done immediately.
Click to expand...
Click to collapse
Same problem here, only on Global version.
RMX1931EX_11_C.36
Security update 5 March 2021
peter0010 said:
That's honestly one of the most useless answers I've read here.
To even be able to unlock the bootloader, you HAVE TO enter the fastboot mode and he cannot. So what you'r saying doesn't make any sense. Like at all.
I do have the same btw and I'm running out of ideas, so if anyone actually has something helpful to say I'd be very thankful.
Neither the button combo nor the adb reboot bootloader does work. I can see the fastboot screen for like half a second and then it reboots normally without even touching the device.
Edit: I just found a way to enter fastboot on my realme X2 Pro.
You have to click on "Start in depth test" on the official Realme App, which can be found here: https://c.realme.com/in/post-detail...64863306907648&subForumId=1197159778845982720
I totally forgot the last setp before actually unlocking the bootloader..
Click to expand...
Click to collapse
I did install the testing app and i'm still having that issue where i only see the fastboot for a split second before the device reboots itself. What am i doing wrong? I also enabled developer mode - OEM unlock - USB debug.
I've flashed my device before and i've even been able to unbrick my own device after "destroying" boot image, but this is something new and it's coming from Realme and i don't appreciate it!
I'm actually looking to replace my device with something more flash friendly, what would you recommend as a good budget device to De-Googlefy?
Hey guys..I am facing the same issue. I cannot get into Fastboot mode using the key combination or adb method. With the ADB method and the unlock tool the phone reboots with fastboot written with some chinese characters for a split second and then boots up as normal.
Has anyone found any solutions?
I am on the 5th March 2021 security update.
I also suffer from the same problem, When I want to go to Fastboot, a logo comes for 2/3 seconds and then the system is rebooted.
I am also facing the same issue. Any Help?
Same here.
Milan-XDA said:
Same problem here, i see the bootloader screen for a split second before it boots into RUI all by itself. It's so annoying.
Click to expand...
Click to collapse
Same on my device, looking for a solution if there is.
Is there room for me?

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