Develop Bugs

[Q] I can't access Bootloader or Recovery PLEASE Help!

My HTC One M8 (Verizon) is seemingly bricked. My phone is rooted, S-Off, with the stock ROM. I have been trying to update to the latest OTA update by returning to stock. I had previously modified some entries in the Build.prop and Platform.xml. I knew those had to be default in order for the OTA to work. I had copied the original files and pasted them to my SD Card so that I could simply cut the modified versions, paste them to my SD Card, and cut the originals from my SD Card and put them in their corresponding system folders.
Upon a reboot something apparently went horribly wrong because all my phone does now is boot with the white screen and green HTC Logo, then the screen goes black. I have tried the typical Power Button + Volume Down but it won't enter the boot loader. The good news is that the USB port seems to still work for my windows computer recognizes a device connecting to it but it doesn't show up as an interactive device in windows explorer..if that makes sense.
Please Help!

SF-Echo18 said:
My HTC One M8 (Verizon) is seemingly bricked. My phone is rooted, S-Off, with the stock ROM. I have been trying to update to the latest OTA update by returning to stock. I had previously modified some entries in the Build.prop and Platform.xml. I knew those had to be default in order for the OTA to work. I had copied the original files and pasted them to my SD Card so that I could simply cut the modified versions, paste them to my SD Card, and cut the originals from my SD Card and put them in their corresponding system folders.
Upon a reboot something apparently went horribly wrong because all my phone does now is boot with the white screen and green HTC Logo, then the screen goes black. I have tried the typical Power Button + Volume Down but it won't enter the boot loader. The good news is that the USB port seems to still work for my windows computer recognizes a device connecting to it but it doesn't show up as an interactive device in windows explorer..if that makes sense.
Please Help!
Click to expand...
Click to collapse
When you connect it to the PC can you pick up the device with adb? If so, have you tried to run the command from adb to boot it into bootloader? adb devices ... if found, adb reboot bootloader
:fingers-crossed:

BerndM14 said:
When you connect it to the PC can you pick up the device with adb? If so, have you tried to run the command from adb to boot it into bootloader? adb devices ... if found, adb reboot bootloader
:fingers-crossed:
Click to expand...
Click to collapse
I'm not too familiar with ADB commands but I typed in "adb reboot recovery" and it said: "error: device not found" so even if my command was wrong it's still not detecting it. I also tried: "fastboot reboot bootloader" and it just says "waiting for device"
Also I feel like it's worth mentioning the phone is automatically rebooting every two minutes or so (haven't timed it exactly but it's a while). Still showing the green HTC Logo then the screen goes dim, then the screen turns off.

SF-Echo18 said:
I'm not too familiar with ADB commands but I typed in "adb reboot recovery" and it said: "error: device not found" so even if my command was wrong it's still not detecting it. I also tried: "fastboot reboot bootloader" and it just says "waiting on device for device"
Also I feel like it's worth mentioning the phone is automatically rebooting every two minutes or so (haven't timed it exactly but it's a while). Still showing the green HTC Logo then the screen goes dim, then the screen turns off.
Click to expand...
Click to collapse
Try holding volume UP + Power button, this simulates a "battery pull", just hold it in for a while it can take a while to "pull", when it's off try again booting into bootloader, volume DOWN + Power button.

BerndM14 said:
Try holding volume UP + Power button, this simulates a "battery pull", just hold it in for a while it can take a while to "pull", when it's off try again booting into bootloader, volume DOWN + Power button.
Click to expand...
Click to collapse
I held Volume Up + Power Button and it showed the white screen with the green HTC logo. I then released all buttons. Once the screen turned off I then held Volume Down + Power Button for two minutes straight and nothing happened.
Even though we haven't found a solution yet, I am appreciative of the help.

sounds like you never installed the htc drivers for your phone, hence your pc doesn't see the phone when you are doing ADB commands.
install the drivers for it, then try the ADB commands via your pc
and dont mess with the build prop or other system files unless you have a working back up and are 101% certain about what you are doing..

Just remember to change directory in command prompt to the folder where adb.exe is located.
I don't know why the device doesn't reboot into bootloader though when you hold volume down + power button, shouldn't have to hold it for 2minutes. Holding volume up + power button to simulate a "pull" should only take up to 20 seconds or so at most and pressing volume down + power will then immediately take you into bootloader mode, or at least it's supposed to.
Did you release the volume up / power combo when the screen went dead or before? Try holding it until the phone shuts off and then right away press volume down + power.
Sorry if I'm not answering right away though, busy eating, and will be here and away for the next hour or so while I get ready for work =o( once I leave for work I'll only be able to help some more after like 2 hours or so. Hopefully we can do something before then though =o)

wase4711 said:
sounds like you never installed the htc drivers for your phone, hence your pc doesn't see the phone when you are doing ADB commands.
install the drivers for it, then try the ADB commands via your pc
and dont mess with the build prop or other system files unless you have a working back up and are 101% certain about what you are doing..
Click to expand...
Click to collapse
You're right, I didn't install the drivers. I did so and ADB was able to recognize it and I was able to access the bootloader. Thank you everyone for your help. I won't be making the mistake again.

SF-Echo18 said:
You're right, I didn't install the drivers. I did so and ADB was able to recognize it and I was able to access the bootloader. Thank you everyone for your help. I won't be making the mistake again.
Click to expand...
Click to collapse
So you'll be able to fix it from here on then? I was just about to link this thread to you as well should you have gotten adb to work again, it's for the RUU for Verizon seeing as you said you're on Verizon.
But going by your response up there you might already know how to fix this issue further :good:

BerndM14 said:
So you'll be able to fix it from here on then? I was just about to link this thread to you as well should you have gotten adb to work again, it's for the RUU for Verizon seeing as you said you're on Verizon.
But going by your response up there you might already know how to fix this issue further :good:
Click to expand...
Click to collapse
Indeed I appreciate it, but I just finished installing the RUU ha. Hopefully this thread will be of use to someone in a similar circumstance in the future.

Share another method of getting into recovery mode on non-responsive blank screen
Hi,
I just want to share how I accessed recovery mode with the same build.prop issue but with S-ON (might work with S-Off too).
I found the solution from here:
http://forum.xda-developers.com/htc...ter-download-mode-t2853100/page2#post62490577
To get into recovery mode on a non-responsive blank screen, hold the power button and volume up button at the same time and then approximately after 10 seconds, switch from pressing the volume up to volume down button before the HTC logo white screen shows while still holding down the power button. After, a white boot screen will give an option to go into recovery mode.

Nexus 5X dead -- need help -- wont boot

Nexus 5X - was working fine all this while till about yesterday evening.. then suddenly when i causally checked, it was in powered off state.
Normal press of the power button did not work. No response. Pressed Power button for 10 seconds -- google logo appeared...... and that's about it -- it powered off again when OS/Android started to load. (no android boot animation).
Tried to boot to fastboot -> was successfull. Phone stays alive in fastboot mode.
Tried to boot into recovery (I had TWRP). Again, shows google logo and then when TWRP screen shows up - phone shuts down.
Dont think its a power button issue - since in fastboot/bootloader mode, the power button and rest of the buttons work as expected & the phone does not reboot.
Battery is fully charged using official charger.
Further, in fastboot mode, i am able to access/push .img files - so that way, i could push full factory image (with no errors, including userdata) & relock the boot-loader & also install the factory recovery.
I can now get into factory recovery -- but nothing much.
One thing i noted was, while in factory recovery, if i try "Apply update from SDCard" option, it says its unable to mount /sdcard (error).
The phone was purchased directly from google & is under warranty.
Have had nexus 4, nexus 5 without any issues in the past.
This nexus 5x --- has been replaced once in the past due to yellow screen issues ...
Any help/fixes will be appreciated...

arjunprabhu said:
Nexus 5X - was working fine all this while till about yesterday evening.. then suddenly when i causally checked, it was in powered off state.
Normal press of the power button did not work. No response. Pressed Power button for 10 seconds -- google logo appeared...... and that's about it -- it powered off again when OS/Android started to load. (no android boot animation).
Tried to boot to fastboot -> was successfull. Phone stays alive in fastboot mode.
Tried to boot into recovery (I had TWRP). Again, shows google logo and then when TWRP screen shows up - phone shuts down.
Dont think its a power button issue - since in fastboot/bootloader mode, the power button and rest of the buttons work as expected & the phone does not reboot.
Battery is fully charged using official charger.
Further, in fastboot mode, i am able to access/push .img files - so that way, i could push full factory image (with no errors, including userdata) & relock the boot-loader & also install the factory recovery.
I can now get into factory recovery -- but nothing much.
One thing i noted was, while in factory recovery, if i try "Apply update from SDCard" option, it says its unable to mount /sdcard (error).
The phone was purchased directly from google & is under warranty.
Have had nexus 4, nexus 5 without any issues in the past.
This nexus 5x --- has been replaced once in the past due to yellow screen issues ...
Any help/fixes will be appreciated...
Click to expand...
Click to collapse
if you press hold power + volume up you go into download mode. there is a thread with all official MM and N roms, so you should be able to install one and hopefully fix your problem. ofc do a clean install
if that does not work, then you might have more luck with lg flash tool to do a factory reset
if nothing works then imo its hardware problem, but since i am not as good at such stuff as most here i refrain to say so

Giorgos Chatziioannou said:
if you press hold power + volume up you go into download mode. there is a thread with all official MM and N roms, so you should be able to install one and hopefully fix your problem. ofc do a clean install
Click to expand...
Click to collapse
can you please point me to the forum links on how to flash using download mode? -- Nevermind : got the links. will try.

[Q] BRICKED m8 wont boot up, go into bootloader mode or recovery

yesterday i unlocked the bootloader, and used ADB and FASTBOOT to flash TWRP 3.0.2 and then rooted by flashing superSU v2.76
the phone was still S-on
i attempted to modify the buildprop file and used TWRP to mount system and copy the file over to /system/
i did have other things ticked as being mounted, like /data and one other partition that escapes me now.
anyway, i copied the buildprop back and used CHMOD755 but thought choosing 644 would be better so i choose CHMOD but entered 0644 as it was asking for 4 characters. after hitting boot system the phone just went black, trying to boot into bootloader mode now doesn't work, nothing happens. the only way i get any sign of life out of the phone now is by holding volume up and power. then the phone will boot for about 5 to 6 secs before going black screened again.
so i can't boot, cant enter recovery or bootloader.
usb debuggung was ticked previously but i'm not sure i even have a working rom now. ADB fails to find a device and trying
Code:
abd reboot bootloader
just brings
Code:
error: device '(null)' not found
am i totally screwed ? or is this something i can fix ???
help needed...

Connect to PC so you can hear connect/disconnect sound.
Press & hold power + volume up buttons to force reboot, once you hear the disconnect sound on PC, release both buttons and quickly press & hold volume down button. This will take you to hboot, select recovery and restore your backup or install ROM zip

ckpv5 said:
Connect to PC so you can hear connect/disconnect sound.
Press & hold power + volume up buttons to force reboot, once you hear the disconnect sound on PC, release both buttons and quickly press & hold volume down button. This will take you to hboot, select recovery and restore your backup or install ROM zip
Click to expand...
Click to collapse
connecting up to PC i don't get any "bing bong" sounds at all. if i try booting with volume up and power while connected to PC i still don't get the bing bong, quickly switching to holding volume down as you suggest doesn't stop the phone going back to black screen.
HEEEEELLLLP !!!!!
EDIT: additional info
the phone has been this way for a few hours now and twice in that time the phone has started booting up by itself (without me touching it), only to go back off again the same as every other time...
EDIT: after leaving the phone to go nuts all by itself and let the battery run down and recharging it, I was able to get back into bootloader mode and recovery to restore a backup.
I am now happily running GPe MM, and about to test out ElementalX

op3 keeps rebooting

hi all
i need a little help here
i have a op3 it wont turn of
wen i hit power buttom for 12 sec it just start again an load start screen
then after 2-3 sec it reboots again
if i hold power an volume + it goes to fastboot screen stay there for 3-4 sec an then reboots again
an i cant use volume buttoms to select
they work because i can hit volume + an it enter fastboot

deleted

nobody ???

Same here
This same issue is happening with me. Were you able to fix it?

anand.deshpande84 said:
This same issue is happening with me. Were you able to fix it?
Click to expand...
Click to collapse
yes it was the power buttom
u have ro push it hard to get it to stop rebooting

Alternate method to get the phone back
Well, out of desperation, I did the following:
1. Keep fastboot and twrp recovery ready
2. Type in the fastboot recovery command in prompt
3. Press volume up and power button.
4. As soon as I get the fastboot screen, quickly connect your phone to the PC
5 As soon as you hear the new device connection music press enter on the command prompt
steps 4 and 5 should be completed within 5 seconds ?
Repeat steps 1 to 5 couple of times until you get the timing right.
Finally it worked for me on third attempt and I got my phone back ?
Once it booted normally I went back to the recovery, wiped the caches, ran diagnostic and repair disk tools nothing came out of the ordinary.
Hope it helps anyone with same problem..

How to reliably start TWRP

I have TWRP installed, and have managed to run it a few times. Now I cannot start TWRP at all.
From off, if I switch on, the following happens:
1) Screen with Samsung Galaxy A70 - Secured by Knox
2) 0.5 seconds later another screen, "this phone's bootloader is unlocked and it software integrity. .." and "press power key to continue..."
3) 5 seconds later, same screen as (1)
4) 3 seconds later, red letters "this phone is not running Samsung's official software"
5) 3 seconds later blank screen with "samsung" and then booting to android.

In my experience I have to flash twrp every time I want to use it( I don't know the reason but I couldn't fix it ) , for booting twrp on the other hand I turn off the phone first, then I press power button+volume down until the "this phones bootloader..." screen appears, here is the tricky part, you have to quickly let go of these two buttons, press power button, let go of the power button (after the warning disappeared) and then press volume down button (and hold it) until twrp logo appears, this happens really fast so you may need to do it a few times to get used to it.

mobin22 said:
In my experience I have to flash twrp every time I want to use it( I don't know the reason but I couldn't fix it )
Click to expand...
Click to collapse
Yes, same here, the only time I have managed to run TWRP on this phone, is right after a flash.
mobin22 said:
and then press power down button
Click to expand...
Click to collapse
Do you mean volume down?

Zilliman said:
Yes, same here, the only time I have managed to run TWRP on this phone, is right after a flash.
Do you mean volume down?
Click to expand...
Click to collapse
Power off the device, plug into a pc, wait for it to start charge, hold vol up and power till it turns on. Wala boots to twrp. If you have magisk installed,you can use the reboot option within magisk.

mobin22 said:
In my experience I have to flash twrp every time I want to use it( I don't know the reason but I couldn't fix it ) , for booting twrp on the other hand I turn off the phone first, then I press power button+volume down until the "this phones bootloader..." screen appears, here is the tricky part, you have to quickly let go of these two buttons, press power button, let go of the power button (after the warning disappeared) and then press volume down button (and hold it) until twrp logo appears, this happens really fast so you may need to do it a few times to get used to it.
Click to expand...
Click to collapse
Samsung changed how to enter recovery on Android 11. Power off device, plug into pc, wait for it to charge, then hold vol up and power till it turns on. Alternatively, if you have magisk installed, use the reboot options within magisk.

I did that. Thanks!
But it has gone to:
Android Recovery
Samsung /a70qxx/a70q
11/RP1A.200720.012./A705FNXXUB5DVB3
user/release-keys
Use volume up/down and power.
Reboot system now
Reboot to bootloader
Apply update from ADB
Apply update from SD card
Wipe date/factory reset
...
...
...
Where is TWRP? It seems it's gone.

Zilliman said:
I did that. Thanks!
But it has gone to:
Android Recovery
Samsung /a70qxx/a70q
11/RP1A.200720.012./A705FNXXUB5DVB3
user/release-keys
Use volume up/down and power.
Reboot system now
Reboot to bootloader
Apply update from ADB
Apply update from SD card
Wipe date/factory reset
...
...
...
Where is TWRP? It seems it's gone.
Click to expand...
Click to collapse
That's because you're not installing it properly go back to my guide and follow it exactly and stop listening to these other people. I've been modding this device since it first came out with Android 9, I know every inch of this device. You're getting confused by what other people are telling you

MarvinMod said:
5- Press and hold vol down and power till the screen turns blank then immediately press and hold vol up. The device will reboot then land you in the twrp splash screen
Click to expand...
Click to collapse
It fails here, on this step. After successful flash of recovery.tar, power + vol down to reboot, cable still connected, nothing you can do now can bring TWRP up. The phone boots into Android.
EDIT: I think I have now got it. I will update in a few mins.

Zilliman said:
It fails here, on this step. After successful flash of recovery.tar, power + vol down to reboot, cable still connected, nothing you can do now can bring TWRP up. The phone boots into Android.
EDIT: I think I have now got it. I will update in a few mins.
Click to expand...
Click to collapse
After successful flash of recovery.tar, power and vol down to reboot, as soon as the phone screen goes blank, immediately release all keys and press and hold vol up. Must be as soon as screen goes blank. The device will then reboot twice and land you in twrp splash screen. You must hit vol down and power after successful flash then when screen blanks, vol up. If you miss this step, twrp will not hold and revert back to stock recovery.

Here is the notes I made today:
****************************************************************
INSTALL + START TWRP
phone is off
press up + dn
insert cable
go into download (press up)
ODIN 3.14 + AP:tar(vbmeta.img+twrp.img), auto reboot off, press upload
when it succeeds, press dn + pwr until it reboots
then quickly up + pwr until it starts (no need to hold down)
this starts in TWRP
from powered off
press pwr button
goes into twrp or android(system) -- depending on what was used last time
if we used reboot->system last time it will now **Always** go into system!
to go back into twrp:
switch off
power cable until charge
pwr + up until it starts
****************************************************************
The above means that you CANNOT go back to TWRP unless you have a cable and a PC near by.