Develop Bugs

[Q] Help! - Rooted Zenfone 2 (ZE551ML) bricked after OTA accidently

followed a tutorial (Cnncted's youtube clip - How to root the ASUS ZenFone 2 ) to root
Accidentally (very stupid) pressed the update option when an OTA update showed up yesterday (Jul 8 2015), and after that the phone won't start properly - stopped at in search of incredible...
No luck with trying to boot into recovery mode (power + volume up). It just vibrates once and the screen is black. Trying to flash recovery image with ADB and flashtool etc, but the MTP usb connection failed. If I connect it to the PC using the USB cable and then press the power button to turn it on (stuck in that ..."incredible" screen), device manager shows the Z200AD name with a yellow exclamation mark beside, and Asus ZenUI software will automatically start. But it's not really recognized by the PC.
So...if you have any suggestions for me to try, please let me know and that would be greatly appreciated!
Harry
p.s. This is a US version, so the it's the WW sku?

Same problem here. I have a rooted 551ML and on July 6th I received an OTA update. I installed it and I'm stuck in boot loop. I have hundreds of family pictures in the internal memory.
The good news is that I have access to boot loader and recovery.
I could not find any custom recovery for Zenfone 2. They are not out yet, right? Is there any way to copy the internal memory of the phone (that doesnt load the OS) to the SD card? Or to paste a file img.boot taken from a downloaded official rom and copy it over the corrupted one on the phone's memory?

If you can access the bootloader, you can do this:
http://forum.xda-developers.com/zenfone2/general/guide-to-apply-ota-bootloop-rooted-zf2-t3127835
Btw, there is a custom recovery out there (TWRP, check the Development section), but you will need an unlocked bootloader to use it in your state (I think).
US version is the WW SKU btw. Hope this helps.

joel.maxuel said:
If you can access the bootloader, you can do this:
http://forum.xda-developers.com/zenfone2/general/guide-to-apply-ota-bootloop-rooted-zf2-t3127835
Btw, there is a custom recovery out there (TWRP, check the Development section), but you will need an unlocked bootloader to use it in your state (I think).
US version is the WW SKU btw. Hope this helps.
Click to expand...
Click to collapse
Joel, thanks a lot! I will give it a try.
fingers and toes crossed...

I faced this problem too. All I did was to flash the boot.img of my version using fastboot,
Then I flashed the firmware, without factory reset I started the phone.
I was continiously getting an error "com.android.process has stopped". Ignoring that, I just backed up my whole data. Did a factory reset. Updated
Boom!! Everything was normal... I hope this helps

Just a quick update - followed the method in the link that Joel referred to, and everything worked beautifully. I did get two error messages like “the contact stopped working..." “The process android.process.acore has stopped working.” I fixed this problem by clearing the data/cache from the "contact" app, and that did the trick without a factory reset etc.
I unrooted the device using SuperSU. The fastboot screen, however, still shows a random serial number 0123456789ABCDEF. Is there a way to revert it back to the real one? I do see the real one from settings - about - status.
xxmmx said:
Joel, thanks a lot! I will give it a try.
fingers and toes crossed...
Click to expand...
Click to collapse

xxmmx said:
Just a quick update - followed the method in the link that Joel referred to, and everything worked beautifully. I did get two error messages like “the contact stopped working..." “The process android.process.acore has stopped working.” I fixed this problem by clearing the data/cache from the "contact" app, and that did the trick without a factory reset etc.
I unrooted the device using SuperSU. The fastboot screen, however, still shows a random serial number 0123456789ABCDEF. Is there a way to revert it back to the real one? I do see the real one from settings - about - status.
Click to expand...
Click to collapse
Isn't everyone serial number the same? mine is.

This is something that I am not sure of. Yours has been rooted as well?
I would like to know what the fastboot screen looks like before rooting.
GGL-Daz said:
Isn't everyone serial number the same? mine is.
Click to expand...
Click to collapse

xxmmx said:
This is something that I am not sure of. Yours has been rooted as well?
I would like to know what the fastboot screen looks like before rooting.
Click to expand...
Click to collapse
Pretty sure rooting didn't affect my fastboot screen at all.

actually i rooted my zenfone 2 and there was an OTA and i tried to install it without un-rooting my phone. the phone would not turn on and it gets stuck in the boot animation.
the phone wasn't detected by the ADB in my pc so i thought of installing some custom recovery, thought that could help.
i tried installing TWRP but i did not unlock the bootloader and now i am not able to enter in recovery mode either, everytime i try to get in the recovery modethe phone restarts and goes to fastboot mode.
please help.

dip_anker said:
actually i rooted my zenfone 2 and there was an OTA and i tried to install it without un-rooting my phone. the phone would not turn on and it gets stuck in the boot animation.
the phone wasn't detected by the ADB in my pc so i thought of installing some custom recovery, thought that could help.
i tried installing TWRP but i did not unlock the bootloader and now i am not able to enter in recovery mode either, everytime i try to get in the recovery modethe phone restarts and goes to fastboot mode.
please help.
Click to expand...
Click to collapse
I was having a similar issue where adb wouldn't recognize my phone but fastboot was detecting it. What I ended up doing was grabbing the latest stock firmware zip from asus, transferring it to my external sd card via adapter and renamed it to MOFD_SDUPDATE.zip. Then go into fastboot (restart with volume up key) and proceed to recovery. It should automatically update your system from there. The only bummer is having to re-configure everything.

5ifty1 said:
I was having a similar issue where adb wouldn't recognize my phone but fastboot was detecting it. What I ended up doing was grabbing the latest stock firmware zip from asus, transferring it to my external sd card via adapter and renamed it to MOFD_SDUPDATE.zip. Then go into fastboot (restart with volume up key) and proceed to recovery. It should automatically update your system from there. The only bummer is having to re-configure everything.
Click to expand...
Click to collapse
i tried it with prerooted as well as the stock rom, it did not work for me. isn't there any way to flash CM12.1 using the fastboot ?

Edut;Deleted OS and all zips are marked as corrupted.

First, let me start off by saying I'm an idiot; my phone was stuck in a bootloop and out of panic I tried to fix the problem and only made it worse. Now I'm left with no OS installed and I'm stuck at my custom recovery.
I am using twrp as my custom recovery and I'm able to use my mac to send files successfully to my phone. The problem arises when I try to flash the zip and I am prompted with the message that says that the file is corrupted. I tried installing multiple zip files onto my phone and when returning it to stock did not work I even tried to flash Cyanogen Mod. Each time I was greeted with the same message.
This sucks because I just bought my nexus 5x and I don't want to lose it to a stupid mistake. If anyone could help in anyway that would be amazing. If not I will still accept prayers for my potentially dead phone.
-Carlos
Edit: problem solved. I did what you guys said and returned to stock and didn't panic. Thanks so much.

you mean the unlocked bootloader message? thats nothing
or maybe the md5 message, which also is normal?
to me sounds like you are panicking for no reason, but anyway, search for nexus root toolkit, install it, and choose the option to revert stock + unroot

Giorgos Chatziioannou said:
you mean the unlocked bootloader message? thats nothing
or maybe the md5 message, which also is normal?
to me sounds like you are panicking for no reason, but anyway, search for nexus root toolkit, install it, and choose the option to revert stock + unroot
Click to expand...
Click to collapse
Yeah as said above there is no need for panic.
Even if your recovery wont flash the zips you can flash the stock factory images via fastboot manually (i dont now if its available on mac if not boot a linux live disk).
And if your bootloader is still locked unlock it reboot to bootloader and then flash the images.
By the way you should provide more information such as os details twrp version bootloader state and so on...:fingers-crossed:

HTC One M9 Stuck in HTC logo. Bootloop in download mode. S-On, Locked, Official Rom

HTC One M9, no branding, official software, locked and S-ON.
one month ago my phone got (for no apparent reason) serious software problems, so spend a lot of time on the internet to find a solution. in the end, i downloaded the correct stock rom, put it on a sd card and reinstalled stock android via the download mode. it worked out really well, my phone was running like new.
but 2 days ago i pick up my phone and realize it's stuck in a bootloop. (again for no apparent reason) using the right button combinations, i am able to get into the bootloader.
when i try to flash the stock rom with the exact same method that worked last time, it says "start ui_updating" and gets caught in the bootloop again. (i dont think i did anything wrong because the exact same procedure worked last time)
when i enter recovery mode, i get the infamous red triangle. using the right buttons, i can still access the recovery mode from there. now, when i try to factory reset from here, i get the following errors: E: failed to mount /preload (invalid argument).. try emmc mount E: Cant find device node for mount point again E: mount /cache fail, format it and mount again ----- about 5 more similar errors after those 3.
I tried to flash recovery img with fastboot but i get an error similar to:
9 RU_SECURITY_FAIL recovery and bootloader isn't BL_UNLOCKE
I guess this is because my phone doesn't have usb debugging enabled or it doesn't have an unlocked bootloader.
I also tried to unlock the bootloader but after running the command: fastboot oem get_identifier_token i don't get the token so i can post it to htcdev and unlock my bootloader.
Anybody help or had the same issue and fixed it?
Thanks in advance

DE2IS said:
HTC One M9, no branding, official software, locked and S-ON.
one month ago my phone got (for no apparent reason) serious software problems, so spend a lot of time on the internet to find a solution. in the end, i downloaded the correct stock rom, put it on a sd card and reinstalled stock android via the download mode. it worked out really well, my phone was running like new.
but 2 days ago i pick up my phone and realize it's stuck in a bootloop. (again for no apparent reason) using the right button combinations, i am able to get into the bootloader.
when i try to flash the stock rom with the exact same method that worked last time, it says "start ui_updating" and gets caught in the bootloop again. (i dont think i did anything wrong because the exact same procedure worked last time)
when i enter recovery mode, i get the infamous red triangle. using the right buttons, i can still access the recovery mode from there. now, when i try to factory reset from here, i get the following errors: E: failed to mount /preload (invalid argument).. try emmc mount E: Cant find device node for mount point again E: mount /cache fail, format it and mount again ----- about 5 more similar errors after those 3.
I tried to flash recovery img with fastboot but i get an error similar to:
9 RU_SECURITY_FAIL recovery and bootloader isn't BL_UNLOCKE
I guess this is because my phone doesn't have usb debugging enabled or it doesn't have an unlocked bootloader.
I also tried to unlock the bootloader but after running the command: fastboot oem get_identifier_token i don't get the token so i can post it to htcdev and unlock my bootloader.
Anybody help or had the same issue and fixed it?
Thanks in advance
Click to expand...
Click to collapse
Hi Sorry to say, I have " Exactly" the same problem and have also reached the same place, I asked on these forums without success. in the end I sent it back to HTC and they want £200 to repair it or £29.00 diagnostic fee. I have asked them to send it back and will have to pay the £29.00. If it is within warrantee send it back.

m01y1i00 said:
Hi Sorry to say, I have " Exactly" the same problem and have also reached the same place, I asked on these forums without success. in the end I sent it back to HTC and they want £200 to repair it or £29.00 diagnostic fee. I have asked them to send it back and will have to pay the £29.00. If it is within warrantee send it back.
Click to expand...
Click to collapse
Thanks for your fast reply.
I will get in contact with them and see what they will say. My phone is under warranty so i will pay only for shipping charges.
I bought it from a german eshop and i am from Cyprus.
The problem is, the official distributor for HTC here in Cyprus is Greece and i had a bad experience with them. I sent an old HTC One X 4 years before which had a board issue, and after waiting for a month they sent it back and guess what. It had the same problem. So i got in contact with the US website, described the problem and mentioned also the "official distributors" in Cyprus and Greece and how their "service" was and they told me i will have a brand new phone here in Cyprus within a week (which became a reality).
So before i experience the same issues i will clear everything from here (if anybody know a successful solution) and then communicate with HTC how to resolve this.
Thanks again for your reply!

Is this a general/common problem on htc? I am worried

Spike97 said:
Is this a general/common problem on htc? I am worried
Click to expand...
Click to collapse
I'd be lying if I'd say that I haven't read about the issue several times, already. However, you need to be aware of the fact that most of the time only people with problems are creating threads whereas people who have no issues at all won't do the same for praising the phone.
In other words: Yes, this problem does exist but no, not everyone faces it. I know many users whose M9 is still working fine.

DE2IS said:
HTC One M9, no branding, official software, locked and S-ON.
one month ago my phone got (for no apparent reason) serious software problems, so spend a lot of time on the internet to find a solution. in the end, i downloaded the correct stock rom, put it on a sd card and reinstalled stock android via the download mode. it worked out really well, my phone was running like new.
Click to expand...
Click to collapse
I also have a bootloop issue with Locked and S-ON... Care to let me know how you managed to get it working the 1st time?
Where to find the corrent stock ROM and the method you did to get it working..

i have the same problem. Where can i get a rom.zip

Bootloop
gmayer1212 said:
i have the same problem. Where can i get a rom.zip
Click to expand...
Click to collapse
Take the new OTA Nougat, separate those three files on your sd card
Install it with fastboot
fastboot flash boot boot.img
fastboot flash recovery recovery.img
fastboot flash system system.img
and it will be working takes 5-10 minutes to restart

kwaichang said:
Take the new OTA Nougat, separate those three files on your sd card
Install it with fastboot
fastboot flash boot boot.img
fastboot flash recovery recovery.img
fastboot flash system system.img
and it will be working takes 5-10 minutes to restart
Click to expand...
Click to collapse
Please don't give such advice. If the firmware isn't matching the system version users will face bugs and lags or the phone won't even boot. (The latter happens for example if you try to use an Android M system with an Android L firmware.) Besides a user with a locked bootloader and a firmware/system-mismatch won't be able to install any OTAs unless that person flashes a RUU for fixing the mismatch*. The catch is there is no publicly available Android N RUU for every variant of the M9, at the moment. And with S-ON you aren't able to use older RUUs. That means people might have to contact Llabtoofer's RUU Service (which isn't for free!) if they followed your recommendation.
* Users with an unlocked bootloader need to fix the mismatch, as well, but at least they have twrp backups as an alternative solution for the problem.
@gmayer1212 & @htcm9guy: You may want to read the ReadMe thread. It's pinned above the normal threads here in this section.

Flippy498 said:
Please don't give such advice. If the firmware isn't matching the system version users will face bugs and lags or the phone won't even boot. (The latter happens for example if you try to use an Android M system with an Android L firmware.) Besides a user with a firmware/system-mismatch won't be able to install any OTAs unless that persons flashes a RUU for fixing the mismatch. The catch is there is no publicly available Android N RUU for every variant of the M9, at the moment. And with S-ON you aren't able to use older RUUs. That means people might have to contact Llabtoofer's RUU Service (which isn't for free!) if they followed your recommendation.
@gmayer1212 & @htcm9guy: You may want to read the ReadMe thread. It's pinned above the normal threads here in this section.
Click to expand...
Click to collapse
Sorry for that. Mine was also hanging in bootloop but unlocked S-on T-mobile Germany

kwaichang said:
Sorry for that. Mine was also hanging in bootloop but unlocked S-on T-mobile Germany
Click to expand...
Click to collapse
Don't get me wrong, I don't want to discourage you from helping others. It's just important that you know which variant of the M9 the user with the problems owns in such cases. Just recommending to flash random stock files only causes more problems than it solves.

Just to chime in --- same problem happened to me yesterday.
Phone has been working fine --- then yesterday phone went unstable so I reset and got caught in bootloop.
After doing a factory reset and many tries -- got it to boot to android, only to get bombarded by google play service errors -- most likely wrong version of google play services for android?? I manually installed google play services apk... Reset and after many tries was able to boot again -- system was smooth. But did a quick reset to check whether problem was fixed and now i'm back in boot loop.
I wonder if there's a problem with a recent google apps update over playstore that's killing boot?

Hello,
i have the same problem but in some ways different. My M9 was running nearly fine until yester der evening. I just plugged the power supply and suddenly black screen, bootloop. But the really big problem is i don't come in any different stable mode than bootloader. If i try to get into download or recovery mode, the silver htc-logo appears for less than a secound, short vibration and reboot - and this is in loop also.
So for me i don't se a way to factory reset or reinstall any RUU or anything else?
Is it destroyed? :crying:
I was complete S-Off before, running on the last firmware with ViperOneM9 6.1.0.
Thans for your support,
Bond

That sounds like the dead nand issue. It's a hardware failure (c.f. the FAQ of the ReadMe thread).
Sent from my HTC One M9 using XDA Labs

If your phone is under warranty, it has a stock rom, and bootloader is still locked, then send it to HTC after contacting them via chat.
They will replace either the board or the device.
This is whhat they did for me.

DE2IS said:
HTC One M9, no branding, official software, locked and S-ON.
one month ago my phone got (for no apparent reason) serious software problems, so spend a lot of time on the internet to find a solution. in the end, i downloaded the correct stock rom, put it on a sd card and reinstalled stock android via the download mode. it worked out really well, my phone was running like new.
but 2 days ago i pick up my phone and realize it's stuck in a bootloop. (again for no apparent reason) using the right button combinations, i am able to get into the bootloader.
when i try to flash the stock rom with the exact same method that worked last time, it says "start ui_updating" and gets caught in the bootloop again. (i dont think i did anything wrong because the exact same procedure worked last time)
when i enter recovery mode, i get the infamous red triangle. using the right buttons, i can still access the recovery mode from there. now, when i try to factory reset from here, i get the following errors: E: failed to mount /preload (invalid argument).. try emmc mount E: Cant find device node for mount point again E: mount /cache fail, format it and mount again ----- about 5 more similar errors after those 3.
I tried to flash recovery img with fastboot but i get an error similar to:
9 RU_SECURITY_FAIL recovery and bootloader isn't BL_UNLOCKE
I guess this is because my phone doesn't have usb debugging enabled or it doesn't have an unlocked bootloader.
I also tried to unlock the bootloader but after running the command: fastboot oem get_identifier_token i don't get the token so i can post it to htcdev and unlock my bootloader.
Anybody help or had the same issue and fixed it?
Thanks in advance
Click to expand...
Click to collapse
is your phone recongized - what shows "fastboot devices"

pear-i said:
Just to chime in --- same problem happened to me yesterday.
Phone has been working fine --- then yesterday phone went unstable so I reset and got caught in bootloop.
After doing a factory reset and many tries -- got it to boot to android, only to get bombarded by google play service errors -- most likely wrong version of google play services for android?? I manually installed google play services apk... Reset and after many tries was able to boot again -- system was smooth. But did a quick reset to check whether problem was fixed and now i'm back in boot loop.
I wonder if there's a problem with a recent google apps update over playstore that's killing boot?
Click to expand...
Click to collapse
I too wonder the same - recently had the bootloop issue with my M9, just when it was updating apps from the Playstore... quite suspicious...

My HTC M9 is also in boot loop
htcm9guy said:
I also have a bootloop issue with Locked and S-ON... Care to let me know how you managed to get it working the 1st time?
Where to find the corrent stock ROM and the method you did to get it working..
Click to expand...
Click to collapse
It happened at last Saturday, when I've just tried to perform a regular reset to my HTC M9 (from the regular device's menu).
I can't enter to download mode (fail), wipe cache and wipe all (factory reset) didn't help.
Is there any chance to fix it at home? Or just to buy a new phone?
And, does this issue can occur in other devices, HTC or any other brand?
Please advise.
(Can't upload a picture of my device, since I'm a new user...)
Thanks!

As far as I know there's nothing you can do. There are no reports of successful diy repairs of a dead nand M9.
Theoretically this issue can happen with any phone. However, it looks like the probability of its occurence on a M9 increased a lot during the last months.

I´m also stuck in bootloader mode
recovery mode / download mode endup with red text:
"failed to boot to download mode"
***Software status: Modified***
***LOCKED***
***S-ON***
***Security Warning***
Cannot get the token as fastboot oem commands end up empty or unknown command.
I think USB-debbugging is "off"
How can i get S-OFF
or how can i get token
Thanks.

ZE551ML Stuck in bootloader. No access to recovery what so ever.

So after 2 hours of searching, trying and failing, I just decided to post here and see what help I can get.
Situation is exactly like the title. Had Lineage 14.1 installed, and decided to update the phone. Rebooted the phone and went to TWRP recovery. For whatever reason, I decided to reboot the phone, which ended up in it coming back to TWRP. This repeated until I got the stock recovery, which put me into bootloader instead. Bootloader is now locked, I can no longer get into recovery, and I'm stuck in bootloader for as long as this continues.
So far I have tried:
--------BEFORE TWRP RECOVERY FAILURE AND BOOTLOADER LOCK---------
Factory Resetting
Formatted and flashed ROM
A couple of ADB commands
--------AFTER TWRP RECOVERY FAILURE AND BOOTLOADER LOCK---------
Replaced recovery image file with stock
Idiotically replaced bootloader image file with stock (Locked, can tell since Android N is no longer bugging me with preboot notification which was present before when bootloader was unlocked)
Idiotically replaced the system image file with stock
A slew of fastboot commands (You can comment and I can see if I have attempted them)
Attempted to continue the fastboot process
Attempted to use an automatic rootkit. Did not like my device, so it did nothing at all.
Manually unplugging the battery
Haven't tried:
Placing rom in sd card, like I've seen people say elsewhere. (No SD card available)
Anything else you tell me that I haven't done
I'm not really interested in keeping any files that I've had before, if that is not already made clear.
Anyone that can help me, I really want this to end. :crying: :crying:

BillJake said:
So after 2 hours of searching, trying and failing, I just decided to post here and see what help I can get.
Situation is exactly like the title. Had Lineage 14.1 installed, and decided to update the phone. Rebooted the phone and went to TWRP recovery. For whatever reason, I decided to reboot the phone, which ended up in it coming back to TWRP. This repeated until I got the stock recovery, which put me into bootloader instead. Bootloader is now locked, I can no longer get into recovery, and I'm stuck in bootloader for as long as this continues.
So far I have tried:
--------BEFORE TWRP RECOVERY FAILURE AND BOOTLOADER LOCK---------
Factory Resetting
Formatted and flashed ROM
A couple of ADB commands
--------AFTER TWRP RECOVERY FAILURE AND BOOTLOADER LOCK---------
Replaced recovery image file with stock
Idiotically replaced bootloader image file with stock (Locked, can tell since Android N is no longer bugging me with preboot notification which was present before when bootloader was unlocked)
Idiotically replaced the system image file with stock
A slew of fastboot commands (You can comment and I can see if I have attempted them)
Attempted to continue the fastboot process
Attempted to use an automatic rootkit. Did not like my device, so it did nothing at all.
Manually unplugging the battery
Haven't tried:
Placing rom in sd card, like I've seen people say elsewhere. (No SD card available)
Anything else you tell me that I haven't done
I'm not really interested in keeping any files that I've had before, if that is not already made clear.
Anyone that can help me, I really want this to end. :crying: :crying:
Click to expand...
Click to collapse
What is your IFWI version number in bootloader ?

IFWI Version: 0094.0183

BillJake said:
IFWI Version: 0094.0183
Click to expand...
Click to collapse
Flash raw 4.21.40.184 M with AFT in bootloader
https://forum.xda-developers.com/zenfone2/general/z008-z00a-z00d-z00x-raw-fw-collection-t3448966

Thank you so much. Fixed my phone.

BillJake said:
Thank you so much. Fixed my phone.
Click to expand...
Click to collapse
Marvelous , drop a thank you to realyoti in the link , hit his thanks button too.:good::highfive:

[HELP] My Zenfone 2 (ZE551ML 4GB) dilemma

My Zenfone 2 (ZE551ML 4GB) dilemma:
*•*I unlocked the bootloader with the official bootloader app
*•*I flashed the latest TWRP via adb. In the recovery screen, I saw an android showing error. That's when the panic started.
*•*I Then I rooted my phone with the one click Zenfone root application (available in XDA)
*•*I installed the official TWRP manager from the playstore and flashed with it. That also didn't solve my problem. Actually, a new problem set in. The phone started bootlooping IN RECOVERY.
*•*I rebooted the phone and then flashed an old version of TWRP for my phone. That solved the problem.
*•*Now, I wanted to flash Lineage OS in my phone. According to a YouTube tutorial, I copied my required files (the custom ROM and OpenGAPPS) to my Micro SD and then from twrp's advanced wipe, deleted everything except for Micro SD. I know that was an extremely stupid move but please bear with me.
*•*Deleting everything made things hundred times worse. It seemed impossible to get the phone into recovery mode again. But after a long time, I did.
*•*Now onto flashing the new ROM. I did a factory reset with twrp and then flashed the ROM and immediately got Error 7. By googling a bit, I found that the only way to solve this problem was by deleting the assert lines from the updater-script in meta/com/google/android inside the ROM.
*•* When I reflashed it, the process completed but it showed an error: (E:unknown command [log])
*•* Then I overlooked it again as a quick google said it didn't matter. Then I successfully flashed OpenGAPPS. I rebooted my phone and it kept bootlooping until it was back in the recovery screen. Weird right?
*•*I didn't seem to find any workaround so I decided to restore stock ROM. I downloaded it and flashed it. It succeeded. I rebooted my phone. And. .
*•*My phone now vibrates when I power on the phone and then it shows a black screen. It reboots automatically. I know it does as the phone vibrated periodically after the reboot
*•* I also can't go into the bootloader menu. My phone seems dead but I really need to revive it. I can't afford a new phone. Could you guys help me out please?

LethalHoe said:
My Zenfone 2 (ZE551ML 4GB) dilemma:
*•*I unlocked the bootloader with the official bootloader app
*•*I flashed the latest TWRP via adb. In the recovery screen, I saw an android showing error. That's when the panic started.
*•*I Then I rooted my phone with the one click Zenfone root application (available in XDA)
*•*I installed the official TWRP manager from the playstore and flashed with it. That also didn't solve my problem. Actually, a new problem set in. The phone started bootlooping IN RECOVERY.
*•*I rebooted the phone and then flashed an old version of TWRP for my phone. That solved the problem.
*•*Now, I wanted to flash Lineage OS in my phone. According to a YouTube tutorial, I copied my required files (the custom ROM and OpenGAPPS) to my Micro SD and then from twrp's advanced wipe, deleted everything except for Micro SD. I know that was an extremely stupid move but please bear with me.
*•*Deleting everything made things hundred times worse. It seemed impossible to get the phone into recovery mode again. But after a long time, I did.
*•*Now onto flashing the new ROM. I did a factory reset with twrp and then flashed the ROM and immediately got Error 7. By googling a bit, I found that the only way to solve this problem was by deleting the assert lines from the updater-script in meta/com/google/android inside the ROM.
*•* When I reflashed it, the process completed but it showed an error: (E:unknown command [log])
*•* Then I overlooked it again as a quick google said it didn't matter. Then I successfully flashed OpenGAPPS. I rebooted my phone and it kept bootlooping until it was back in the recovery screen. Weird right?
*•*I didn't seem to find any workaround so I decided to restore stock ROM. I downloaded it and flashed it. It succeeded. I rebooted my phone. And. .
*•*My phone now vibrates when I power on the phone and then it shows a black screen. It reboots automatically. I know it does as the phone vibrated periodically after the reboot
*•* I also can't go into the bootloader menu. My phone seems dead but I really need to revive it. I can't afford a new phone. Could you guys help me out please?
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Did you flash the MM bootloader compatible TWRP mentioned in the OP for LineageOS? That solves error 7.

Ragarianok said:
Did you flash the MM bootloader compatible TWRP mentioned in the OP for LineageOS? That solves error 7.
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I did not do that. I remembered all the steps but forgot that. That is the primary cause of my problem. Anyway to solve it?

LethalHoe said:
My Zenfone 2 (ZE551ML 4GB) dilemma:
*•*I unlocked the bootloader with the official bootloader app
*•*I flashed the latest TWRP via adb. In the recovery screen, I saw an android showing error. That's when the panic started.
*•*I Then I rooted my phone with the one click Zenfone root application (available in XDA)
*•*I installed the official TWRP manager from the playstore and flashed with it. That also didn't solve my problem. Actually, a new problem set in. The phone started bootlooping IN RECOVERY.
*•*I rebooted the phone and then flashed an old version of TWRP for my phone. That solved the problem.
*•*Now, I wanted to flash Lineage OS in my phone. According to a YouTube tutorial, I copied my required files (the custom ROM and OpenGAPPS) to my Micro SD and then from twrp's advanced wipe, deleted everything except for Micro SD. I know that was an extremely stupid move but please bear with me.
*•*Deleting everything made things hundred times worse. It seemed impossible to get the phone into recovery mode again. But after a long time, I did.
*•*Now onto flashing the new ROM. I did a factory reset with twrp and then flashed the ROM and immediately got Error 7. By googling a bit, I found that the only way to solve this problem was by deleting the assert lines from the updater-script in meta/com/google/android inside the ROM.
*•* When I reflashed it, the process completed but it showed an error: (E:unknown command [log])
*•* Then I overlooked it again as a quick google said it didn't matter. Then I successfully flashed OpenGAPPS. I rebooted my phone and it kept bootlooping until it was back in the recovery screen. Weird right?
*•*I didn't seem to find any workaround so I decided to restore stock ROM. I downloaded it and flashed it. It succeeded. I rebooted my phone. And. .
*•*My phone now vibrates when I power on the phone and then it shows a black screen. It reboots automatically. I know it does as the phone vibrated periodically after the reboot
*•* I also can't go into the bootloader menu. My phone seems dead but I really need to revive it. I can't afford a new phone. Could you guys help me out please?
Click to expand...
Click to collapse
xfstk is the only way. go to following thread and do as suggested. one advice when you get into bootloader. flash raw without AFT. that is best.
https://forum.xda-developers.com/zenfone2/help/thead-bricked-phone-updating-to-mm-tips-t3452785