Develop Bugs

[Q] Phone won't boot. Vibrates three times. Need advice.

My G2 won't boot normaly and is acting very straingly. I did a search of other similar problems people have had, but nothing matches what is happening to mine. It started when I noticed my power button and volume up button stoped working. I assumed it was a glitch and thought a reboot might help. Since the power button wasn't functioning, I pulled the battery to reboot it. That's when it stoped working. When I turn it on normaly with the power button, the screen stays off, it vibrates three times, and the led blinks orange untill I put the battery. If I attempt to boot into recovery with the button combination, it does the same. If I attempt to boot into HBoot, it vibrates five times and the led lights up solid green. Here's where things get realy strange. When I plug the phone into the charger while the phone is off, after about five seconds the phone comes on into the recovery bootloader even though when I boot while holding the buttons it dosn't work. I have the ClockworkMod touch recovery installed. From within the recovery I have full access to everything including ADB with root access. When I select the reboot option from recovery, it does the same thing with the vibrating and the blinking led. I tried the key test in the recovery and I discovered that my volume up button only works intermitently and my power button seems to be working fine. I haven't attempted to flash a new rom yet because I'm assuming it must be something else since I can't even access HBoot, and I'm scared if I touch anything I'll loose access to recovery and ADB as well.
Any advice? Could a damaged volume up button contact cause all this to happen? Should I try flashing it from recovery even though I can't access HBoot?

Thread moved to Q & A section, post in the relevant section next time.

in adb try
adb reboot-bootloader

demkantor said:
in adb try
adb reboot-bootloader
Click to expand...
Click to collapse
Just tried it. Screen goes black, vibrates three times, and led blinks orange untill I pull the battey. It was a good Idea though, I didn't think to try that myself.

you know what, are these very quick vibrates? you mentioned there is a problem with your volume rocker (sticky keys?) your phone may be trying to get into the jtag/download mode.
not sure how to use this mode on the vision but tell me if this is the same response you get.
take out battery, hold both volume buttons, plug phone into computer.
it should vibrate three times rapidly and computer should look for driver :
Qualcomm CDMA Technolgies MSM driver
not sure where to get the proper driver for the vision but ive used this mode to root other android phones and i know there is a "unbricking project" for various phones that use this mode.
nothing for the vision that i know of though.
but being you have adb access maybe test a few things first like see if anything is accessible from your emmc
type:
Code:
adb shell
dmesg | grep mmc0
and see what happens
edit:
i can replicate you situation by holding volume up while powering on
you have a stuck volume up key, almost 100% just open up phone and clean it out and you should be just fine!

Need Help! Only displays lit black screen!

Hey I have an evo that was running madwoz jb rom. like a dummy I try to put it to stock using older ruu. it went through setup and said it was finished. now my evo only turns on to a lit black screen. vibrates once with power button with black lit screen. with power plus vol down it doesn't vibrate just lit black screen. thought it was total brick. but when I press vol down and power I can press up or down a couple time and press power and either restart phone or I think enter recovery but with black lit screen. I say that because when plugged to usb and messing with buttons pressing vol and power after it shows on device manager. also adb devices will recognizes the evo but it has recovery beside the serial number instead of device. in this state I cant even read and copy files through adb. but phone stays blank. I really need help. I have no clue what to do.

carolinateejay said:
Hey I have an evo that was running madwoz jb rom. like a dummy I try to put it to stock using older ruu. it went through setup and said it was finished. now my evo only turns on to a lit black screen. vibrates once with power button with black lit screen. with power plus vol down it doesn't vibrate just lit black screen. thought it was total brick. but when I press vol down and power I can press up or down a couple time and press power and either restart phone or I think enter recovery but with black lit screen. I say that because when plugged to usb and messing with buttons pressing vol and power after it shows on device manager. also adb devices will recognizes the evo but it has recovery beside the serial number instead of device. in this state I cant even read and copy files through adb. but phone stays blank. I really need help. I have no clue what to do.
Click to expand...
Click to collapse
Only thing I can think of is putting the stock pc36img.zip file on the sd root folder and trying to get into hboot. If you still cant see the screen check you tube on evo hboot and then at least you can see if you need to hit up or down to confirm installation.

One x bootloop / brick

Hey guys
I have a problem with bricked one x. I get it from my family. It has unlock bootloader and installed cwm. I tried to do something with that but it's first htc in my hand and i'm green. When i turn on phone it shows htc logo and than boot into recovery it doesn't shows me white screen with fastboot option etc , automatically run cwm. I wanted to flash kernel but I can't turn on fastboot mode or I don't know how. Please help my what should I do wake the phone up.

To Enter Fastboot mode
1. Switch off phone completely
2. Press and hold volume down and power
Phone should open in fastboot mode
Use vol up/vol down to make menu selection
Use power button to execute selection
Thanks

grwalker said:
To Enter Fastboot mode
1. Switch off phone completely
2. Press and hold volume down and power
Phone should open in fastboot mode
Use vol up/vol down to make menu selection
Use power button to execute selection
Thanks
Click to expand...
Click to collapse
I can't turn off phone , only possible when my battery goes down. I solved that problem. I flash kernel with recovery (twrp) then by adb push moved rom on phone memory flashed rom and kernel and it works. Please close thread.

[UPDATED] Recover from Hard Brick and QFIL guide through bootloader.

This guide is to recover the Zuk Z2 (plus) from hard brick state
So you might be stuck here -
Phone is not turning on
Phone Reboot and screen go black with notification light on and you are unable to switch it off.
How To-
1. How to switch it off
- First this is happening because you have locked you're bootloader
- You have black screen and led on so just hold power button then Zuk logo will be flash after that you will get black screen again and the phone is preparing to reboot but before that the led will get turn off immediately release power button.
(It's crucial timing but when rebooting your device vibrates so it's the time when phone is about to start vibrate while LED is off just leave power button)
- You have it Your phone is switched off
(Tip- Let it reboot once after that don't leave the power button and after that led will get off you have to remove finger from power button this is tricky )
2. Going to Bootloader
-First connect the USB to laptop
-After you have switched off your phone press volume up and down together and with holding buttons connect the phone to USB and you will see the fastboot mode.
3. Unlock your phone
-Remember the unlock bootloader file in your email re download it and unlock your bootloader again
- Don't reboot right away as you don't have any OS installed Even if it boot it might give problem.
- after unlocking phone you will see phone rebooted press power button reboot press volume the volume button and go to reboot option
4. For Userdata
- I suggest you to flash recovery instead of using old installed one.
- go to fastboot and flash the TWRP.
- Boot into TWRP and you will see your data on internal storage is present so just sideload ROM or if you have in internal storage just flash
( Note- in case you are using TWRP 3.4 newer roms with factory based ROM will flashed without problem in case you are trying to flash old Oreo non-treble ROMs you need to wipe like you do for normal ROM installation and reboot to recovery then flash Oreo Non-treble ROM otherwise they will not boot even after flashing)
Or
- QFIL ZUI 4.0.199ST as this QPST
- When selecting the XML file select retain userdata one so it won't erase your userdata partitions
5. In case you want to flash ZUI
- Load files in QFIL
- To reboot phone into EDL from Fastboot mode type following command
Code:
fastboot -i0x2b4c oem reboot-edl
- It will get detected in QFIL just hit Download.
In case you run into Sahara failed error follow my guide to fix sahara error
[url]https://forum.xda-developers.com/lenovo-zuk-z2/themes/how-to-fix-common-sahara-errors-t4168535[/URL]
Hit thanks if helped:good:

xtra sharif said:
This guide is to recover the Zuk Z2 (plus) from hard brick state
Scenario is as follow-
Phone is not turning on
Always Zuk logo comes and screen go black with notification light glowing and you are unable to switch it off
How To-
1. How to switch it off
-firstly this is happening because you have locked you're bootloader
- You have black screen and led on so just hold power button then Zuk logo will be flash after that you will get black screen again and again the phone was preparing to reboot but before that the led will get turn off immediately release power button
- You have it Your phone is switched off
(Let it reboot once after that don't leave the power button and after that led will get off for small time this is the time you have to remove finger from power button this is tricky )
2. Going to Bootloader
-Firstly connect the USB to laptop
-after you have switched off your phone press volume up and down together and with holding buttons connect the phone to USB and you will see the fastboot mode
3. Unlock your phone
-Remember the unlock bootloader file in your email re download it and unlock your bootloader again
- after unlocking phone you will see phone rebooted press power button reboot press volume the volume button and go to reboot option
- go to fastboot and flash the TWRP and you will see that your data on internal storage is present so flash any ROM and you will see your data
Hit thanks if helped:good:
Click to expand...
Click to collapse
thanks, you saved my life.:laugh:

Phone not turning on, only white light blink
xtra sharif said:
Hi Please help me.
Today morning phone not turning up. while pressing any combination, only while light blinks. When connect to charger same white light blink.
Phone is not vibrating.
Click to expand...
Click to collapse

saumis84 said:
xtra sharif said:
Hi Please help me.
Today morning phone not turning up. while pressing any combination, only while light blinks. When connect to charger same white light blink.
Phone is not vibrating.
Click to expand...
Click to collapse
press the power button for longer duration.
Click to expand...
Click to collapse

PrincE.. said:
saumis84 said:
press the power button for longer duration.
Click to expand...
Click to collapse
Hey thanks for responding.
So i have tried every combination mentioned on internet, saw the deep flash method as well(but didn't attempt.)
Left my phone untoched for full day.
switched my regular charger to moto turbo charger and volla my phone booted!
PS: there was only single white light blink while pressing power button and when connected to charger it blinks continually with no vibration.
Click to expand...
Click to collapse

Saved me
Thanks, this saved my phone.
I struggled with key combination to get into fastboot but finally got in and recovered my zuk.
xtra sharif said:
This guide is to recover the Zuk Z2 (plus) from hard brick state
Scenario is as follow-
Phone is not turning on
Always Zuk logo comes and screen go black with notification light glowing and you are unable to switch it off
How To-
1. How to switch it off
-firstly this is happening because you have locked you're bootloader
- You have black screen and led on so just hold power button then Zuk logo will be flash after that you will get black screen again and again the phone was preparing to reboot but before that the led will get turn off immediately release power button
- You have it Your phone is switched off
(Let it reboot once after that don't leave the power button and after that led will get off for small time this is the time you have to remove finger from power button this is tricky )
2. Going to Bootloader
-Firstly connect the USB to laptop
-after you have switched off your phone press volume up and down together and with holding buttons connect the phone to USB and you will see the fastboot mode
3. Unlock your phone
-Remember the unlock bootloader file in your email re download it and unlock your bootloader again
- after unlocking phone you will see phone rebooted press power button reboot press volume the volume button and go to reboot option
- go to fastboot and flash the TWRP and you will see that your data on internal storage is present so flash any ROM and you will see your data
Hit thanks if helped:good:
Click to expand...
Click to collapse

nadddy said:
Thanks, this saved my phone.
I struggled with key combination to get into fastboot but finally got in and recovered my zuk.
Click to expand...
Click to collapse
Hey I have a hardbricked zuk but the only signs of life is a white led and at times a vibration when I connect it to pc there is a a port written as Qualcomm HS-USB Diagnostics 900E (COM4) . I've seen quite a lot of threads of booting it to edl and deep flashing is not a choice I'm willing to take . I'd appreciate it if you are able to help me

thanks
Thanks a lot buddy.
Bricked today by flashing a baseband.
Revived as per your guide.
Actually i'm never tensed about flashing roms, Kernels, fonts, apps, mods anything and bricking our device.
There are so many good guys to save our a$$...................
Thanks buddies....... :good::good::good::good:

Need Help with ADB [Volum Up/Down + Power button BROKEN]

My ADB is On in settings and I can use ADB normal. But when my Phone is off I can't turn it on anymore the only way would be with ADB command: ADB reboot devices!
Power button + Volume UP/DOWN isn't working anymore...
The thing is, when connecting my Phone to my PC after it gets off it will show the charging animation. And when my phone reached 100% it stays in the animation and doesn't boot up. ADB isnt working in that state.
How can I boot my phone?? Pls I hope someone can help me PLS PLS

You must try conclude pins on motherboard for button volume up when you connecting USB cable, after that fastboot was started and you can type fastboot reboot command on pc.

my volume up button broken and i need that to flash stock rom again as phone in bootloop and cant access recovery,phone boots and shows logo for 1 sec and reboots again any ideas plz i flashed the oneos rom

ireaper4592 said:
my volume up button broken and i need that to flash stock rom again as phone in bootloop and cant access recovery,phone boots and shows logo for 1 sec and reboots again any ideas plz i flashed the oneos rom
Click to expand...
Click to collapse
If you have power and volume-down buttons functioning, boot the phone with the power button and when the bootloader unlocked warning comes up, press the volume-down button and you will get the options for restart, fastboot, recovery etc. Simply choose what you want with the volume-down button and confirm with the power button.

tnsmani said:
If you have power and volume-down buttons functioning, boot the phone with the power button and when the bootloader unlocked warning comes up, press the volume-down button and you will get the options for restart, fastboot, recovery etc. Simply choose what you want with the volume-down button and confirm with the power button.
Click to expand...
Click to collapse
yes got that problem is i need volume up button to work so i can put in adb mode so i can flash stock rom,i decrypted my devices then installed the oneos rom and thats when i lost access to recovery and goot into bootloop?