Develop Bugs

help Zenfone 2 black screen, no bootloader or TWRP vibrartes twice and nothing

Hello
I was updating from a M version to another M verions. But I had to use the temporary recovery method.
This is what I was doing but didn't finish properly
Requirements:
1. Unlocked bootloader
2. TWRP for Z00A (Download | How to Install TWRP)
Unlock Bootloader on Android 6.0 Marshmallow ZenFone 2 ZE551ML/ZE550ML
Download tool (Download Here)
1. Extract it and connect Zenfone 2 with laptop/pc
2. Click unlock.bat will automatically detect whether the adb or fastboot mode, and then reboot into bootloader
3. Will appear on the screen to unlock the success of mobile phones after five seconds will reboot, then hold volume up the phone automatically re-boot back to bootloader.
4. If you missed the previous step, press the power button for 10 seconds off, then press the "Volume Up" and hold the power button to boot into bootloader.
5. After the phone has successfully re-enter the bootloader, click restore.bat on the computer, where the restore refers to the restore Android ifwi 6.0 otherwise Android phone can not enter the system.
6. The phone will reboot and restore white on black ASUS logo screen, and then enter the Android system.
Click to expand...
Click to collapse
I extracted and connect my zen2
Ran the unlock.bat
The phone entered the bootloader, flash his things and boot again but on the white screen
Then I had to hold power button 10s to turn it off and turn it on again
Entered the bootloadr by holding Power+Vol UP then to recovery.
At this time I just used the recovery as I usualy do, Wipe everything, cache, data, etc.
Connect to the PC, put the new UL-Z00A-WW-4.21.40.184-user.zip there and flash.
BUT now that comes the problem. I select the option to boot it after finish flashing.
So obviously I didnt finish the steps mentioned on the quote above.
I didnt ran the restore.bat before reboot into system and now All I see is black screen.
I've tryed some steps of those tutorials for briked phones but My computer can't see the device for long enough
http://forum.xda-developers.com/zenfone2/help/thead-bricked-phone-updating-to-mm-tips-t3452785
I try to do those steps but I'm stuck on this part
now back to the Zenfone 2, hold power for 20 seconds to shutdown, then press simultaneously the key "power" + "volume down", until phone vibrates. Or computer makes detection sound, wait a few seconds it will add an item immediately below intelSoC in device manager “MOOREFIELD” new devices is successful.
Click to expand...
Click to collapse
My phone doesn't boot even on bootloader. It just vibrate twice and then nothing happens.
On my device manager I can see the "Moorefield" but only for a brief moment. when I try to turn on the phone then it immediately disapears and repeat this process (Vibrate twice, long preiod doing nothing and still black screen, then vibrates again twice, repeat)
Any suggestion?
Thanks in advice

Seikushim said:
Hello
I was updating from a M version to another M verions. But I had to use the temporary recovery method.
This is what I was doing but didn't finish properly
I extracted and connect my zen2
Ran the unlock.bat
The phone entered the bootloader, flash his things and boot again but on the white screen
Then I had to hold power button 10s to turn it off and turn it on again
Entered the bootloadr by holding Power+Vol UP then to recovery.
At this time I just used the recovery as I usualy do, Wipe everything, cache, data, etc.
Connect to the PC, put the new UL-Z00A-WW-4.21.40.184-user.zip there and flash.
BUT now that comes the problem. I select the option to boot it after finish flashing.
So obviously I didnt finish the steps mentioned on the quote above.
I didnt ran the restore.bat before reboot into system and now All I see is black screen.
I've tryed some steps of those tutorials for briked phones but My computer can't see the device for long enough
http://forum.xda-developers.com/zenfone2/help/thead-bricked-phone-updating-to-mm-tips-t3452785
I try to do those steps but I'm stuck on this part
My phone doesn't boot even on bootloader. It just vibrate twice and then nothing happens.
On my device manager I can see the "Moorefield" but only for a brief moment. when I try to turn on the phone then it immediately disapears and repeat this process (Vibrate twice, long preiod doing nothing and still black screen, then vibrates again twice, repeat)
Any suggestion?
Thanks in advice
Click to expand...
Click to collapse
you must post question in the thread you are trying instead of making new one. any ways. long press power button to shut down the device completely. then press power button and volume down button. as phone vibrates release power button but keep holding volume down button and wait till moorefield appears in device manager. now release the volume button then click begin download in xfstk.
if u have further question post in in above thread you are following to unbrick

sukhwant717 said:
you must post question in the thread you are trying instead of making new one. any ways. long press power button to shut down the device completely. then press power button and volume down button. as phone vibrates release power button but keep holding volume down button and wait till moorefield appears in device manager. now release the volume button then click begin download in xfstk.
if u have further question post in in above thread you are following to unbrick
Click to expand...
Click to collapse
I did it already and only shows up for a brief moment like I said and then disappears a second before the phone vibrate

help please D:

Seikushim said:
help please D:
Click to expand...
Click to collapse
any luck fixing? i got the same result, no screen or anything, two vibrations since yesterday

Sadly, no.
no fix for me yet...
Let me know if you find something

You have tô unbrick your phone. There are some tutorials in the forum

I am using the Z008D variant of the Zenfone 2.
I had bricked my phone 3 times and the guides that had helped me are:
https://forum.xda-developers.com/zenfone2/help/thead-bricked-phone-updating-to-mm-tips-t3452785
https://forum.xda-developers.com/zenfone2/general/guide-brick-soft-hard-bricked-zenfone-2-t3284256
I too had the same problem the first time I unbricked my phone. The moorefield device would show up briefly in device manager. It is stated in the guide that you had to press power+vol down when connecting the phone to use xFSTK. I googled and found that you had to actually press and hold the vol down button only and then connect the USB cable, then release it when the moorefield device is detected.

Startup blocked on Logo LG

Good morning,
When I start my tablet, I remain stuck on the LG logo ...
I can't connect my Pc with lg pc suite or Lg mobile support tool or flashtool.....
Can you help me please ?
Thanks
Edit 07/05 : i got the message on boot ; Secure booting error! Cause : boot certification verify
Eric

I just went thru this with my a G Pad 8.0, had quite a few hangups but I ended up figuring it out. Some suggestions from what I learned... :
- Fully charge up your tablet. Mine was charging extremely slow, so I left it plugged in overnight and that finally ended up doing the trick.
- Make sure you have the correct driver installed. If you go to LG's website and find their downloads section, you can search for your device and download its driver. I'm pretty sure their tablet driver isn't device specific, but so if you have any difficulty finding this, let me know and I can post the one that worked for me. After you download the file, don't forget to open and install it. While you're there, you can I'd just go ahead and re-download and reinstall their mobile support tool, just to make sure you've got the most current update. After it installs, open the program; I don't know if you have to, please let but I'd have it open and waiting before you do these next steps.
- Completely power off your device. Unplug it from the wall and turn it off. I found that if I just held down the power button until the screen went dark, my tablet 3would restart itself a few seconds later. But when I kept holding down the power bites dxton thru the reset, it would turn off a 2nd time and actually stay off (about 15sec or so).
- In order to run LG's support tool, you'll wanna boot into download mode. You can search for your device online and it should explain how to do this, I found a couple conflicting methods but I believe the one that worked for me was just by holding the volume up key and then plugging it in to your PC with a USB. If that doesn't work, try pressing the volume up and power keys together then plugging it in, or try pressing both of the volume keys. One of those 3 should have you entering download mode. It will take a few seconds after you attach the cord for you to boot up; keep holding down the keys you pressed until you see the download mode screen. When plugging it in, but I it might be easier to keep holding down the buttons if you start with the cord plugged into your powered off device, and and then plug the other end into your PC while you are doing the boot process. It shouldn't matter which end you connect last, and I found this method to be way less awkward.
- The LG mobile support tool should automatically recognize your device and automatically start the update, and but you might need to select your device yourself, or at least the service provider, in order to update correctly. Just DON'T unplug your tablet thru the entire process. I think the whole thing took me about 15 minutes, depends on your Internet speed really.
- if you've managed to successfully run the update and you're still stuck in a boot loop, you're gonna have to reset your device. Again, you can Google how to do this, but I think most LG's perform a hard reset by making sure the phone is turned off, then press and hold the power and volume down keys. When the LG logo appears, release the power key for a second while still holding down the volume key, and then press and hold power down again until you see the reset screen. Use your volume and power keys to factory reset your device.
Hopefully, now it is should be able to boot just fine! Let me know if you encounter any problems and I'll see what I can do to help.

Hi, thanks for your help sheebie, i'll try asap .
Regards
Eric
sheebie said:
I just went thru this with my a G Pad 8.0, had quite a few hangups but I ended up figuring it out. Some suggestions from what I learned... :
- Fully charge up your tablet. Mine was charging extremely slow, so I left it plugged in overnight and that finally ended up doing the trick.
- Make sure you have the correct driver installed. If you go to LG's website and find their downloads section, you can search for your device and download its driver. I'm pretty sure their tablet driver isn't device specific, but so if you have any difficulty finding this, let me know and I can post the one that worked for me. After you download the file, don't forget to open and install it. While you're there, you can I'd just go ahead and re-download and reinstall their mobile support tool, just to make sure you've got the most current update. After it installs, open the program; I don't know if you have to, please let but I'd have it open and waiting before you do these next steps.
- Completely power off your device. Unplug it from the wall and turn it off. I found that if I just held down the power button until the screen went dark, my tablet 3would restart itself a few seconds later. But when I kept holding down the power bites dxton thru the reset, it would turn off a 2nd time and actually stay off (about 15sec or so).
- In order to run LG's support tool, you'll wanna boot into download mode. You can search for your device online and it should explain how to do this, I found a couple conflicting methods but I believe the one that worked for me was just by holding the volume up key and then plugging it in to your PC with a USB. If that doesn't work, try pressing the volume up and power keys together then plugging it in, or try pressing both of the volume keys. One of those 3 should have you entering download mode. It will take a few seconds after you attach the cord for you to boot up; keep holding down the keys you pressed until you see the download mode screen. When plugging it in, but I it might be easier to keep holding down the buttons if you start with the cord plugged into your powered off device, and and then plug the other end into your PC while you are doing the boot process. It shouldn't matter which end you connect last, and I found this method to be way less awkward.
- The LG mobile support tool should automatically recognize your device and automatically start the update, and but you might need to select your device yourself, or at least the service provider, in order to update correctly. Just DON'T unplug your tablet thru the entire process. I think the whole thing took me about 15 minutes, depends on your Internet speed really.
- if you've managed to successfully run the update and you're still stuck in a boot loop, you're gonna have to reset your device. Again, you can Google how to do this, but I think most LG's perform a hard reset by making sure the phone is turned off, then press and hold the power and volume down keys. When the LG logo appears, release the power key for a second while still holding down the volume key, and then press and hold power down again until you see the reset screen. Use your volume and power keys to factory reset your device.
Hopefully, now it is should be able to boot just fine! Let me know if you encounter any problems and I'll see what I can do to help.
Click to expand...
Click to collapse

LG G8s Bootloop after rooting with Magisk

Today I installed magisk with the help of this guide https://forum.xda-developers.com/lg-g8/how-to/rooting-g8s-guide-t4044193 . It worked and I had root access. After some hours I restarted my phone and now it's in bootloop. It can't shutdown and it's restarting endlessly (pressing the power button for 20 seconds shut it down but it immediatly restart). I can only enter the hard reset menu (by holding volume down and power button, is there a combination for recovery mode with volume up?)
I know I need a way to enter fastboot mode to reflash the normal boot partition from the original kdz or the entire kdz but I can't. neither adb devices or fastboot devices finds the phone and the phone it's not in recognized by the PC so no COM port assigned. Tried to follow this https://www.mylgphones.com/lg-g8-th...nbrick-restore-lg-g8-thinq-back-to-stock.html
Update: I entered the fastboot mode. I plugged the usb-c cable while clicking the volume down button while the phone was off. Now I will try to flash the boot_a.image from the original kdz file
Flashing the original boot_a.image worked. I will now try to understand why this happened

Note is stuck in a bootloop - and I can't seem to install recovery/not sure if it's corrupt

Hey all,
Hope you've been keeping safe and well.
So I was flashing the new PixelExperience ROM - and seems like I made an error somewhere along the way.
I'm looking to return to stock, and then give the process another shot - but at the moment my phone is stuck in a bootloop.
The bootloader is unlocked - and the boot goes through the following screens before rebooting:
1. Samsung Logo
2. "The phone's bootloader in unlocked....Press power key to continue"
3. Samsung Note 10+ Logo Screen.
I'm trying my best to try and boot into either download or recovery mode, but to no avail - it just restarts the bootloop on each combination I've tried.
Any solutions on how to get moving with this?
Thanks!

rajalot said:
Hey all,
Hope you've been keeping safe and well.
So I was flashing the new PixelExperience ROM - and seems like I made an error somewhere along the way.
I'm looking to return to stock, and then give the process another shot - but at the moment my phone is stuck in a bootloop.
The bootloader is unlocked - and the boot goes through the following screens before rebooting:
1. Samsung Logo
2. "The phone's bootloader in unlocked....Press power key to continue"
3. Samsung Note 10+ Logo Screen.
I'm trying my best to try and boot into either download or recovery mode, but to no avail - it just restarts the bootloop on each combination I've tried.
Any solutions on how to get moving with this?
Thanks!
Click to expand...
Click to collapse
Timing will be the key. To help out, boot up as you have been, but as early into the boot cycle press and hold the Vol - and power button for up to 5 seconds (until phone manually shuts off) [it will actually reboot the phone])), then the instant it powers off and begins to power back on (try a few times to get used to the timing) press and hold the key combination for recovery or download mode. In my experience whatever combination you go with while booting, the power button only needs to be held for the first 5 seconds or so of the combo button press/hold.
The other button, Vol+ or Vol- should constantly be held until desired mode begins to load.

louforgiveno said:
Timing will be the key. To help out, boot up as you have been, but as early into the boot cycle press and hold the Vol - and power button for up to 5 seconds (until phone manually shuts off) [it will actually reboot the phone])), then the instant it powers off and begins to power back on (try a few times to get used to the timing) press and hold the key combination for recovery or download mode. In my experience whatever combination you go with while booting, the power button only needs to be held for the first 5 seconds or so of the combo button press/hold.
The other button, Vol+ or Vol- should constantly be held until desired mode begins to load.
Click to expand...
Click to collapse
Thanks for your quick and detailed reply man, appreciate it.
Still trying, new cords, ports, the whole buffet. Will keep at it.
Major flag though - my PC doesn't recognise the phone anymore, checked the USB ports in Device Management and nothing comes up. I've tried different cords and ports to no avail.
I have a feeling that because the device doesn't think it's not plugged in - it doesn't boot into recovery.
Just another detail - the flash goes on just before the reboot. Does this signify anything?

rajalot said:
Thanks for your quick and detailed reply man, appreciate it.
Still trying, new cords, ports, the whole buffet. Will keep at it.
Major flag though - my PC doesn't recognise the phone anymore, checked the USB ports in Device Management and nothing comes up. I've tried different cords and ports to no avail.
I have a feeling that because the device doesn't think it's not plugged in - it doesn't boot into recovery.
Just another detail - the flash goes on just before the reboot. Does this signify anything?
Click to expand...
Click to collapse
I'm not familiar with any significance the flash may point to. You've probably already done this.....but be sure to reboot PC....
Have you tried booting to recovery yet?

Question Why wont my S22 go into Download mode or recovery mode?

So I have spent hours now looking around for an answer the phone is find my phone locked and I can't remember my pin code. I have done all the tricks with the combination keys.
The usual way to get into Recovery mode is Hold V+ and power until the phone vibrates and you should be in recovery mode release the keys. (Doesn't work)
Iv read that you should have the USB cable connected from pc/laptop while you do the same holding V+ and power button... (doesn't work ether)
and download mode should be very easy just hold V+ and V- plug USB cable from pc/laptop and you should get into download mode by pressing V+. Will only show charging Icon and that's its.
So is it possible to turn off this modes from the manufactor? Or is this a completely new security future? How can you use odin? How can you wipe the cache? If you end up having some issues.
Im going nuts....
No way to get into fastboot ether. So if anyone know why this is happening to me or got any solution I would appreciate it.

Plug in your cable with the phone turned on. Hit Power Off and wait for the phone to fully turn off. The charging logo will show up so let the animation do its thing. After maybe 20 seconds, press Volume up + Power and keep them pressed until you boot to recovery. If the command wasn't recorded in the first place and the phone is still off after more than 15 seconds, let go of the buttons and press them again and keep them pressed until it boots in Recovery

dragos281993 said:
Plug in your cable with the phone turned on. Hit Power Off and wait for the phone to fully turn off. The charging logo will show up so let the animation do its thing. After maybe 20 seconds, press Volume up + Power and keep them pressed until you boot to recovery. If the command wasn't recorded in the first place and the phone is still off after more than 15 seconds, let go of the buttons and press them again and keep them pressed until it boots in Recovery
Click to expand...
Click to collapse
It will not work. How the hell should I be able to cle3ar cache if I got a boot loop ??? They can't just turn off recovery mode mand download mode??? This is so strange even paying for a frp reset but not even he does know what wrong??? Can they turn off fastboot, recovery mode and Download mode on this new phones? Is it because its locked with find my phone? 1 week researching now. It will only vibrate. And my PC cant find my phone anymore worked fine 30min ago nothing has changed... So annoying never seen this happened before every combination with buttons to get in any mode doesn't work only vibrates and go to pin lock screen...

Take it to a Samsung Experience center at best buy. Or send it into Samsung for repair.

download mode:
Turn off phone
plug cable in pc but not in phone
pres "volume +" and "volume -" in the same time
plug cable in phone
recovery mode:
plug cable in pc and s22
power off
press "volume +" and power
wait until see recovery mode

starciti said:
download mode:
Turn off phone
plug cable in pc but not in phone
pres "volume +" and "volume -" in the same time
plug cable in phone
recovery mode:
plug cable in pc and s22
power off
press "volume +" and power
wait until see recovery mode
Click to expand...
Click to collapse
thats a solid advice assuming his bootloader/recovery/download mode is fully functional then this advice works, in his case and in mine too it does not work and trying to get to the root of the problem is the key. In my case recovery mode gives error on screen so it may have to do with the way firmware is installed as these modes are not accessible.

have you sorted it out? Its nearly a year onwards =)

CrispShadow19 said:
thats a solid advice assuming his bootloader/recovery/download mode is fully functional then this advice works, in his case and in mine too it does not work and trying to get to the root of the problem is the key. In my case recovery mode gives error on screen so it may have to do with the way firmware is installed as these modes are not accessible.
Click to expand...
Click to collapse
This, at index 2:48 minutes.
It needs to be connected to the PC. Another screwy quirk Samsung added recently. Your button timing/sequence matters as well.
On my N10+'s you can go into recovery directly with a restart if you do it right. Otherwise they will puke on you.