Hello everyone, i have bought a LG H440n yesterday with a error screen that says "boot certification verify, Secure booting error! Cause: boot certification verify". I bought it cause i thought it was going to be a easy fix with a reflash (i was very wrong). If i hold down the power button nothing happens (on rare ocasions it actually goes to that screen) , but if i take out the battery and plug in the charger then put the battery back in and hold the power button i get to this screen. If i hold down power button + volume down i get to a fastboot screen i can connect to with my computer but it is very useless cause LG killed their bootloader unlock website. It used to be able to go to download mode (which would show the same error screen and shut down the phone :// ) by holding volume up + power button but it doesnt let me do that anymore. Now if i try to go to download mode it just brings me to the lg splash screen with that error and shuts down. Volume up + volume down + power also brings me to that same error screen. Is there any hope for this phone or should i just sell it/ trade it?
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If powered off, pressing together PowerON + VolUP + VolDown does not power on my N7 3G to bootloader. It gives no response.
After releasing this combination, I have to long press PowerON to power on the N7 3G, as it cannot power on properly.
However, PowerON + VolDown does work, this combination boots my N7 3G to bootloader. It is strange...
Also, after flashing recovery, I tried to make it permanent by
Code:
mv recovery-from-boot.p recovery-from-boot.bak
However, it said "no such files".
I tried to "ls" and could not find anything like "recovery-from-boot.p" and "recovery-from-boot.bak"
But the recovery does stick...not sure why
(I used recovery-CWM-touch-6.0.2.3-tilapia.img)
human-being said:
If powered off, pressing together PowerON + VolUP + VolDown does not power on my N7 3G to bootloader. It gives no response.
After releasing this combination, I have to long press PowerON to power on the N7 3G, as it cannot power on properly.
However, PowerON + VolDown does work, this combination boots my N7 3G to bootloader. It is strange...
Click to expand...
Click to collapse
AFAIK, there is no such button combination Pwr+Vup+Vdwn.
What is happening is that you are putting the tablet into APX mode with Pwr+Vup
Once it goes into APX mode, it takes 13 sec of holding Pwr down continuously to cause a reset to occur. It takes another 3-5 seconds after this before the bootloader splash screen shows up.
If you continue to hold down the power button, and press Vdwn within 1 second (be ready for it!) of the bootloader splash screen (B&W Google logo in center of screen + unlocked padlock image at bottom if the bootloader is unlocked) appearing on the screen, the tablet will go to fastboot mode.
If you miss that short-lived opportunity the bootloader will attempt to boot the image in the boot partition (LNX); which is to say: a normal OS boot.
In general you can always force a reboot by holding the power button down long enough (no matter what mode the tablet is in!) - and if you have Pwr+Vdwn pressed within one second of that bootloader splash screen appearing, the bootloader will go into fastboot mode rather than attempting a normal boot.
[REF] Nexus 7 Button Combinations
bftb0 said:
AFAIK, there is no such button combination Pwr+Vup+Vdwn.
What is happening is that you are putting the tablet into APX mode with Pwr+Vup
Once it goes into APX mode, it takes 13 sec of holding Pwr down continuously to cause a reset to occur. It takes another 3-5 seconds after this before the bootloader splash screen shows up.
If you continue to hold down the power button, and press Vdwn within 1 second (be ready for it!) of the bootloader splash screen (B&W Google logo in center of screen + unlocked padlock image at bottom if the bootloader is unlocked) appearing on the screen, the tablet will go to fastboot mode.
If you miss that short-lived opportunity the bootloader will attempt to boot the image in the boot partition (LNX); which is to say: a normal OS boot.
In general you can always force a reboot by holding the power button down long enough (no matter what mode the tablet is in!) - and if you have Pwr+Vdwn pressed within one second of that bootloader splash screen appearing, the bootloader will go into fastboot mode rather than attempting a normal boot.
[REF] Nexus 7 Button Combinations
Click to expand...
Click to collapse
Thanks for point this out.
It is strange that many tutorials which I read are having instructions saying this combination can bring your N7 to bootloader. That's why I got confused.
Hi
need help!!!!!
My phone is completely messed up.
i got an update form LG.
after installing it the phone got suck in boot loop.
I has CWM installed.
i but could and even when try to install new rom it was still in boot loop.
i installed manual via adb commands TWRP.
and then thing became real bad.
no after it powers up i get the LG logo.
1 sec after i get few error codes and then black screen without ADB support.
i trierd to get into download mode after reading in forums that only this can help.
but I can't.
I powered down my phone in all possible methods:
power 10sec, power + V- 10 sec, power + V+ 10 sec.
after the phone is off i tried power it back into download mode with the next combinations:
power + V+ and then USB, power + V- and then USB,power + V+ and V- and then USB.
did not work.
can't get into download mode.
I will be happy to get some help.
Thanks
Ran :good:
sorry was wrong.
try turn phone off, add usb, then press volume up. I think that's it.
Hi
did no work also
I am having the same problem, went to lg service centre, they could not enter download mode as well. I might need to change the circuit board for $321 singapore dollars..
Hi
i think you have to use this fix: http://forum.xda-developers.com/showthread.php?t=2582142
This happened to me,
Try holding the power and volume down hold until lg logo, let go and press and hold the volume down and power again, it should get you in recovery.
It might get you into a screen called "Factory hard reset" Agree using the power button, and it should take you to your recovery, and try flashing a ROM along with the Gapps (if you want, which I did) and then I used a recovery file after booting back into recovery to restore it to my previous state.
Good luck :good:
Shut down phone
From what I got from this, you're having problems shutting down your phone, correct? It keeps booting back up after the screen goes black? If this is the case, hold the power button (and don't let go) until it goes black, reboots itself, then goes black again. Shouldn't take more than 2 seconds after rebooting to shut down. Then, you can do volume up + USB to get into download mode.
Ben_Z98 said:
From what I got from this, you're having problems shutting down your phone, correct? It keeps booting back up after the screen goes black? If this is the case, hold the power button (and don't let go) until it goes black, reboots itself, then goes black again. Shouldn't take more than 2 seconds after rebooting to shut down. Then, you can do volume up + USB to get into download mode.
Click to expand...
Click to collapse
Thanks for your help,it sorted out my problem! :good:
Hi,
I have a Samsung XCover 2 (or GT-S7710) that is stuck in a boot loop. The phone has never been flashed or rooted.
I couldn't get the Samsung logo shown, just a not-spinning spinner.
Image I have : andre-k.at/img/image1.jpeg
Taken from thread : forum.xda-developers.com/android/help/gt-s7710-samsung-bootloop-t3015707
When I try to enter in recovery mode (vol up, home, power) nothing happens.
When I try to enter in download mode, I have download mode shown a few seconds, then reboot...
I tried to flash a stock rom with odin and download mode, but flashing was interrupted by a loop, and now I have "Firmware upgrade encountered an issue. Please select recovery mode in Kies & try again." shown a few seconds, and then reboot...
Any idea on how to get my phone working ?
Thanks
HI,
the real reason is maybe that the phone isnt charging
To fix it hold on charger after 1st shut down hold power volume down and home button. When you enter download mobe click on volume down button very fast before it turns off. It wll restart to fastboot ( samsung galaxy xcover 2 and model showed. It will shut down after it. So when you click on restart after 1 sec hold the volume up and home button. the power button will automaticly trigger and then when it showes the logo 1st time wait when the screen is black wait and when logo shows again release the buttons. then wait you whil enter recovery and dont do anything just let it charge it wont restart in this mode for some reason
reply me if you did it or there is an error
I actually have the same problem, but when I reboot it in fastboot and I press the volume up + home button, it displays the loading screen and it just doesn't work.
Am I doing it wrong ?
Hii I have a open bootliader and TWRP 3.0.2-r3 on my phone and this morning recieved a update to android 7.0 I did that and it asked my to restart my phone when I restarted my phone got stuck at "Warning Bootloader Unlocked" screen
I couldnt restard it by pressing Vol down and power key.
it is stuck untill battery runs out
please help what to do.
vinaykeasri said:
Hii I have a open bootliader and TWRP 3.0.2-r3 on my phone and this morning recieved a update to android 7.0 I did that and it asked my to restart my phone when I restarted my phone got stuck at "Warning Bootloader Unlocked" screen
I couldnt restard it by pressing Vol down and power key.
it is stuck untill battery runs out
please help what to do.
Click to expand...
Click to collapse
You can't update modified firmware i must be stock for OTAs. If vol down + power key don't work, try this method (make sure battery is not drained out) - take your phone while it's off, press and hold vol down and vol up buttons together and plug it into computer via USB - it should boot in fastboot mode.
Hi Masters,
Need your advice here.
My p9 lite cannot boot up and only shows your device is booting now screen.
I cannot power off even force power off, and there is no responding whatever key combinations i pushed.
The step taken to this error is I did unlock my p9 lite and tried to flash twrp by following the guide, then I cannot enter fastboot mode and recovery mode after that.
I tried take out the battery and let the phone disconnect with power supply, after i put back the battery, i push the power key it still shows same screen as your device is booting now.
Any idea how to resolve this? I assume some fatal error with the motherboard, but i can say nothing after i unlock the phone.
Your suggestion and advice are much appreciateļ¼ thank you!
I had the same problem,what I did was force power off by holding power button for ,well idk how long but until device booted down,then I held volume down and connected it to pc,so it enters fastboot,but you have to do it fast,as it will reboot once its turned off.Then I tried various twrps,revolution recovery etc,and the only one that worked was meticulus twrp.I know you said you cant force power off,but try holding power key long
Once you hold the power off button, the phone will never power off, instead, the phone will reboot and bring you to the error page "your device is booting now" and stuck there. I tried to push the power up or power down button before i see huawei logo, but it will show me the same page.
Yes,when you hold power off phone will reboot,and you have to be fast with volume down and cable.Pre-plug the cable it computer ,bring it near phone,power off and before it boots plug it in while holding volume-
thank you for your suggestion. I tried many times, no matter how quickly i am, I only able to see the device booting page. I have mentioned one point above, i did take out the battery, and i see the error screen after i put back the battery, so i assume the problem with motherboard.
How many of you did return the faulty and unlocked phone to service centre then get "free" services?