Stock T-mobile G2 suddenly stuck in bootloop. No update. Want to backu - G2 and Desire Z Q&A, Help & Troubleshooting

So, 2 nights ago I was just sending a message to someone when my phone rebooted. I wasn't downloading an update to my knowlege. Now it won't boot mostly. I can't get into download mode either. If I wait about an hour then hold the power button it will start and get to my home screen. It will stay on for about a minute then shut off and give me a LG splash screen or the t-mobile screen. When attempting to enter download mode I get the 8 red flashes. If I just leave it plugged into my laptop I'll get the charging screen. If I then power up, after some time my computer will recognize it's com port and modem but not as a hdd. There are files I absolutely need for work and school and they haven't been backed up. What does the craftiest android user do in this situation? I can get to the factory wipe screen. But, I really can't just wipe this phone yet. Help me PLEASE! I've watched hours of videos and read so much over at xda and haven't found anything that quite suits my situation other than a factory wipe. There's gotta be another way.
I can't get into the boot loader. Volume up and power only starts the boot loop again. Can't do download mode. I have gotten it to boot a few times but only for a second before restarting and giving me the LG screen
I've tried both the LG pc Suite and the Lg mobile support tool and tried the "restore upgrade errors" approach. Keeps getting to the end and telling me that the phone isn't charged. It's 100% charged. I have the ability to make videos but I wont have time until Sunday.
Can't get into fastboot. Fast boot for PC starts opens and shuts instantly. I also have the Minimal ADB and fast boot but it says it doesn't recognize a device.
I read another post where a nexus user had a similar issue and was able to root with CWM, though I believe he must have been able to get into the download mode.
This is stock. I've rooted my old galaxy S2 but kept this one stock. I've only skimmed the surface as far as the knowledge and ability many of you have and I'm hoping you have some kind of method of fixing this or at least eliminating the things I could try.
Very sorry for such a long post. It's late and I'm loopy. Thanks in advance for your help.

Pretty please!

You are in the wrong section my friend. This is T-mobile HTC G2 (aka HTC desire Z) section.
Thanks...

Oh, that makes a lot of sense! oops. Thanks.
arunal_123 said:
You are in the wrong section my friend. This is T-mobile HTC G2 (aka HTC desire Z) section.
Thanks...
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Related

[Q] Unable to boot into recovery

Hi there,
First time user with a desire on the telus network. I was referred to this site through a friend who did the froyo upgrade to his phone.
I have been working all day at figuring out how to root my phone and have had little luck getting any tutorial to work.
most recently I have use the linux version and the windows version of unrevoked and both go through the whole process and say done but leave my phone turned off and to the point that I have to pull the battery to get it on again. When I enter recovery mode and selected recovery the phone flashes the white screen with the HTC logo and then right to black. Previously in the day it would allow me to go to the black screen and allow me to flash the update files.
Can anyone help or point me in the right direction.
cheers
kieran
kierster said:
Hi there,
First time user with a desire on the telus network. I was referred to this site through a friend who did the froyo upgrade to his phone.
I have been working all day at figuring out how to root my phone and have had little luck getting any tutorial to work.
most recently I have use the linux version and the windows version of unrevoked and both go through the whole process and say done but leave my phone turned off and to the point that I have to pull the battery to get it on again. When I enter recovery mode and selected recovery the phone flashes the white screen with the HTC logo and then right to black. Previously in the day it would allow me to go to the black screen and allow me to flash the update files.
Can anyone help or point me in the right direction.
cheers
kieran
Click to expand...
Click to collapse
Reflash
Sent from my HTC Desire using XDA App
are you pushing the lock button in recovery mode or the optical trackpad?
Sometimes people are not intelligent enough and cant flash a phone because they dont read the details in tutorials (--->ME<---)

[Q] Galaxy Nexus black screen of death

Basically, this: http://forum.xda-developers.com/showthread.php?t=1384415
No one responded to that thread because it was in the wrong forum.
I got the "Phone -- ! -- PC" screen, and was attempting to fix it before getting this black screen of death.
Galaxy Nexus GSM
Rooted, Codename ROM, don't think there is a Kernel in there
Carrier: Virgin Mobile
Edit: I won't be able to respond for a couple hours as I'm going to work. Any and all help is much appreciated.
Original post from above thread below:
Hello guys,
I have recently bought my first android phone, the Samsung Galaxy Nexus.
On the second day I decided to root it since I needed market enabler, as my local market (UAE) has literally no apps.
I rooted using the SDK tools, fastboot and superboot. Everything worked fine for 1 day.
However, the next day, the phone just died on me, and would not boot at all. It kept getting stuck on the "Google" image at startup. At that point, I could still go into the bootloader. I tried locking/unlocking the bootloader again, since that basically wipes all the date on the phone, but it still refused to load, it would get stuck at the startup animation.
After a few more attempts, it kept spam restarting every time I tried to switch it on.
At that point, I was downloading the default OEM ROM so I could reflash that onto the phone. However, I thought I could try using the superboot bat file again, and maybe that would fix the problem. BIG MISTAKE.
As soon as I ran that file, the phone COMPLETELY died. It will not start at ALL, it will not go into Bootloader, not go into Recovery mode, and not even go into Download (odin) mode.
The ONLY possible response you can get from it, is when you plug it into the PC. My PC seems to play that "detection" sound, same sound as when you plug in a USB, but it would just play that sound over and over again, as if im plugging/unplugging a device really quickly. It seems like the phone is continously restarting itself. When I connect the phone to the PC and that disconnect/reconnect sound comes up, I went into my device manager and I could see the following:
An item under "Other Devices" called "OMAP4440" keeps appearing and dissapearing all the time, with the little "!" mark next to it indicating that there is a driver error. The drivers for this phone are fully installed on this same PC, and it use to work fine before it went dead.
Now the problem is since I cant get into any mode whatsoever, its a bit hard to diagnose the phone. I know there is a "recovery" slot at the bottom of the phone that is accessible with a small pin, but I dont for the life of me know how that works or what it does. Does anybody know how to work that or what it actually does?
Any help would be appreciated! Thanks fellas.
Click to expand...
Click to collapse
What i with my little (almost nothing experience in android) would do its going to another computer with no drivers installed, would download the toolkit and install those drivers, then plug the phone and see what happen, im sure its not bricked since the computer recognice it.. I did lot of stuff with blackberry and there was a lot of ways to recover a phone like that... From here if the toolkit recognice it in any way.. Then you could try to do some of those steps.. As far as i tried doing all kind of stuff to my phone, toolkit its for much the Best Tool and way to do anything to your phone or at least for starters like me
Sent from my Galaxy Nexus using xda premium
But the computer doesn't actually recognize it. The "detection" sound it makes is for an unresponsive device. It won't charge, won't be recognized, and no matter what combo I use, it doesn't turn it.
I played dumb, called Samsung, and now I'm going to send it in. Thanks for the help though.
sometimes my screen goes blank and I have to pull the battery and everything comes back to normal

boot loop - probably bricked

Hello,
I wanted to debrand my htc wildfire s, and after many unsuccessful attempts (main version older) following other tutorials on the forums, I finally went to this one:
http://forum.xda-developers.com/showthread.php?t=1162971
Followed it step by step, everything was as expected until the flash in the end finished and the phone, instead of booting, entered boot loop.
Now when I try to boot it or to enter bootloader, the backlight turns on for a second, turns off after that, then again turns on for a second, off... and etc. It doesn't even show the HTC screen. When I turn it off and connect it to usb - it charges.
I am already assuming the worse, but if anyone has any ideas, it will be great, as this is my girlfriend's phone and I can already see the tears in her eyes when she understands the phone is dead... :'(
Can you get the phone into hboot?
Pull battery,
then put it back in,
then hold volume down and press power while still holding volume down
If luck is on your side you should be in hboot
Unfortunately I have tried that already - still the same backlight on / off / on ... loop. :-/
Try battery out, back in, connect USB, then try to boot into bootloader. See if your PC picks it up. If it does try to issue the fastboot command "fastboot reboot recovery" and see if it goes.
Also does it vibrate when its having its flashy seziure?
sent from my android powered beast!
Hi,
Thanks for the suggestion. Tried that also - unfortunately - no vibration (qualcom diagnostics seems to not be the case - unfortunately).
Connecting it to usb brings the orange "charging" light for a 5-10 secs, after that the phone tries to boot and enters the bootloop again.
I think after 5 HTC phones, I will finally have one matching my avatar... :'-(
Hmm. Does the PC pick it up at all?
sent from my android powered beast!
No, it doesn't
I am probably going to go buy a new identical phone today afternoon...
try going into recovery, wipe data and cache and try again the process
simaka said:
No, it doesn't
I am probably going to go buy a new identical phone today afternoon...
Click to expand...
Click to collapse
Whoa, I wouldn't be so hasty. Try taking your old one to a service first, it'll cost you a lot less
@johnnyspritz
I am thinking about sending it back to repair, the phone is still under the 2 years warranty. However if they find a way to read the contents of the boot or system partition (JTAG?), they might have some arguments against applying the warranty :-D
Hi Simaka,
Like you my phone is in the same boot loop....
Can't access to Bootloader, no HTC Logo.
I have try to contact HTC, but the mail they send me was out of context ....
If you find any solution, please share it ;-)
Hi, for sure I will. For now I will try to return it in the shop where I bought it as it is still s-on and locked bootloader, so they might agree to take it back. I checked the possibility to buy JTAG connection equipment, but it amoints to 150€ with shipping, plus probably a month or 2 of troubleshooting...
One interestimg thing to note is that during the procedure described on the link above the current rom version in misc.img before editing it was 9.9.9.9
I believe this was a way of artificially imposed restriction so any attempt to update would fail...
Sent from my HTC Desire using xda premium
Phone is bricked due to radio malfunction. Idk if there is a way to fix it but other than that ur bricked
Hi, I had a phone call from HTC.
They cannot say if its broken, I have to send it to the support.
I also got phone call from my service - they are looking into it
Sent from my HTC Desire using xda premium
Just a final update, i got a new phone that was easy to unlock boot. The end
Sent from my HTC Desire using xda premium

Nasty Bootloop after Flash on Sprint G2

Last night I installed geefree on my phone from the app store and used it to install TWRP. I downloaded a nightly CM11 and an appropriate gapps. Using geefree I rebooted to recovery (never figured out the button combination to boot to recovery "naturally") and installed both of the zips. This could be where I made my mistake, I installed both at the same time.
Now my phone loops, displaying the LG logo for a few seconds, then shutting off and rebooting before repeating the process. I can't seem to get it to go into download mode or the recovery menu. I've tried power+up, power+down, down+up and each of those while plugging the device in, etc. I can get the device to a hardware key control mode, though it doesn't seem too useful.
How can I save my phone? This forum has been a great resource in the past and I'm very grateful for the many tutorials I've followed rooting other devices. Hopefully you guys can save the day once again!
Volume up plus power is how to access recovery on sprint.
What stock sw version were you on before you flashed cm?
Did you wipe data before flashing?
Sent from my LG-LS970 using xda app-developers app
I was using stock 4.2.2, I believe. I didn't wipe the data (shame on me), a bad habit that I picked up from my first rooted device, the Samsung Moment. It didn't ever matter on that one, afaik. Thanks for the reply!
Edit: Volume up and power whether plugged in or not takes me to the hardware key control mode screen.
Second Edit: http://forum.xda-developers.com/showthread.php?t=2432476&page=35 I also found this thread where someone seems to be experiencing similar issues and they fix it with "LG Utility." Is that a PC application? It's a little vague to google, but I've been trying!
I have a bootloop issue every time i flash a rom i have to wipe all but sd flash roms and gapps the i do a restore from twrp and oly restore my boot image only and they boot no prob
I'm kind of starting to suspect my power button doesn't work at all for whatever reason. I have a lot of difficulty getting the phone to shut down, then it doesn't seem to easily power up. It's a strange collection of problems. Would a Sprint repair place be able to fix this?
If they have parts on hand if not either a swap out or a sendoff
Same problem here - bootloop and no download mode - CWM works! - urgently need help
I guess I have the same problem as InlineFourPower (apart from that my power-button has no problem).
I am stuck in bootloop since I tried to upgrade to Kitkat a few days ago. Now I can´t get into download mode any more, nor into fastboot or anything else. Only CWM works.
From within CWM I can successfully flash ROMs but that doesn´t help, since afterwards I am still stuck in bootloop. It is possible, however, to push files via adb-commands while I am in CWM.
Does anybody have an idea how to go from here or how to get download-mode back?
Device is recognized but can´t be mounted - bricked forever?
Parinibbana said:
I guess I have the same problem as InlineFourPower (apart from that my power-button has no problem).
I am stuck in bootloop since I tried to upgrade to Kitkat a few days ago. Now I can´t get into download mode any more, nor into fastboot or anything else. Only CWM works.
From within CWM I can successfully flash ROMs but that doesn´t help, since afterwards I am still stuck in bootloop. It is possible, however, to push files via adb-commands while I am in CWM.
Does anybody have an idea how to go from here or how to get download-mode back?
Click to expand...
Click to collapse
I tried a few things on Linux.
After terminal-command "ls /dev/sd*" when the device is unplugged from the computer I get "/dev/sda".
When the device is connected via USB, I get: "/dev/sda /dev/sdb"
So sdb is my LG G2.
So I went on to the next command: "gdisk -l /dev/sdb"
As a result I get: "Problem opening /dev/sdb for reading! Error is 123."
Does it mean that the phone isn´t mounted or what? Now I´ve connected my phone to another Linux machine with the same result. It is recognised (p.e. as sdd), but there is no sdd1. Seems as if it is recognized, but can´t be mounted. Does that mean my device is bricked for good? That´s it?
to get the phone into download mode you have to plug the usb cord in and hold VOL+, so to get this right as I have a case on mine, plug the usb into the phone first then hold VOL+ and plug into usb port on the computer.
it does take a loooong time to power down the phone with the button when stuck in a boot loop, just keep holding it until it shuts off, it will shut off eventually!!
plug the phone in while in download mode to install drivers and set com ports, then unplug before you begin your flash with LGFlashTool, hope this helps you out.
Cronic2009 said:
to get the phone into download mode you have to plug the usb cord in and hold VOL+, so to get this right as I have a case on mine, plug the usb in first then hold VOL+ and plug into usb port.
it does take a loooong time to power down the phone with the button when stuck in a boot loop, just keep holding it until it shuts off, hope this helps
Click to expand...
Click to collapse
Thanks Cronic2009 for your advice.
There are, however, szenarios where download-mode is not accessible any more. Neither by using the hardware-keys, nor by using the adb-command.
After four days of resarch and a lot of trial and error, I finally unbricked my F320L using the two adb-commands outlined at the beginning of that thread: http://forum.xda-developers.com/showthread.php?t=2451696
Worked like a charm.
Thanks everyone for your advice.
no problem buddy, glad you got it figured out, good luck to you from here on out!
FYI, that link doesn't work
I just wanted to ask anyone who might know, since the bootloader of the LS980 is locked, we cannot "break" this correct, so no matter what commands we decide to run through root, we cant touch the true bootloader there for LS980 fail safe? (Besides Acts of God, EMP, ect)
Cronic2009 said:
no problem buddy, glad you got it figured out, good luck to you from here on out!
Click to expand...
Click to collapse
Thanks for letting me know. I corrected the link in my previous post.
Be sure if you use a aosp based rom to flash the ZV8 modem. Your can use dr87 or furnance kernals after you flash the zva modem althought i have encountered soft brick due to this.
so i'm having this exact issue and i don't know how to get out of it. i just need to transfer the radio to my phone somehow but nothing shows up under adb devices. i'm trying to the lg mobile support tool now. its downloading the software. but if it doesn't work does any one have any fixes?
edit: i fixed it by following this http://forum.xda-developers.com/showthread.php?p=51637410&highlight=download+fail#post51637410
pitbullmommy45245 said:
so i'm having this exact issue and i don't know how to get out of it. i just need to transfer the radio to my phone somehow but nothing shows up under adb devices. i'm trying to the lg mobile support tool now. its downloading the software. but if it doesn't work does any one have any fixes?
edit: i fixed it by following this http://forum.xda-developers.com/showthread.php?p=51637410&highlight=download+fail#post51637410
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Click to collapse
Thank You for sharing you fixed your issue pittbullmommy but the link you posted points back to a post about a failed run on LGFlashTool, will you please fix the link and point it to the post/guide you used to fix your phone, it may help others stuck in a similar situation, glad to hear you got it fixed and working, best of luck with it from here on out!
Hi all
was just about to start a new thread but didn't want to get into trouble..anyway I am in need of some assistance please.my ls980 has been bricked for some time now been searching all over the internet for a solution to be stuck back at square one.found this video on youtube which is pretty much exactly what my phone is doing.I have used lg flash tool to revert to stock and still nothing I lost root doing that but last night,I managed to regain root access I have no idea how but it happened when i clicked ioroot batch file i went into download mode and it stated bottom left ROOTED in red so i managed that but that is it still doing what is being shown in the video its on youtube
watch?v=PjLF-pBhZSY
please if anyone has the know how I would like to fix this phone rather then bin it thank you all happy 4th everyone
After using tot and flash tool to get back to stock, did you try going into stock recovery and do a factory data reset? I know it sounds stupid especially after a tot but try it. Couldn't hurt
Sent from my LG-LS980 using Tapatalk
Borderline noob here, so please bear with me...
I have been using TWRP 2.7.0.0 to do all my work, and I was able to get the Lego ROM installed with ZVA. I got into too big of a hurry and forgot to make a backup of stock. I've also been unsuccessful in trying to install ZVC modem and firmware. Thankfully ZVA works as does the LEGO ROM, but I'd like to have stock there to access as well. The stockZVC that's on the Android Development page has been getting stuck (bootloop?) on the Sprint Spark logo. I've done TWRP's factory reset with no success. Any help would be great.
Thanks in advance!
Yes sir I've tried that and more to no avail is there anything I can do through adb I'm on stock recovery phone doesn't stay on long enough to install anything
sarfdawg said:
Borderline noob here, so please bear with me...
I have been using TWRP 2.7.0.0 to do all my work, and I was able to get the Lego ROM installed with ZVA. I got into too big of a hurry and forgot to make a backup of stock. I've also been unsuccessful in trying to install ZVC modem and firmware. Thankfully ZVA works as does the LEGO ROM, but I'd like to have stock there to access as well. The stockZVC that's on the Android Development page has been getting stuck (bootloop?) on the Sprint Spark logo. I've done TWRP's factory reset with no success. Any help would be great.
Thanks in advance!
Click to expand...
Click to collapse
You ever get her fixed?

LG G3 Blue Screen

Earlier today I was using my phone I forget what exactly I was doing I think I was using the web browser or opening an app. The phone randomly restarted and after the LG Logo screen appeared I got a blue screen for about 10 to 15 seconds and the screen went off. I pulled the battery to see if that would help but that didn't work. Tried safe mode and even factory reset both times got the blue screen (can get the little menu tho) I then plugged the phone into the computer and initially I could get it into download mode. But after installing the LG drivers, and installing LG Flash Tool I went to flash it back to stock. (My phone has pretty much been stock and unrooted except for the lollipop update. ) When I went to flash the phone screen went blue and the flash tool was unsuccesful at implementing the flash. I also tried the LG Mobile Support Tool. Now intermittently I can get the phone into download mode and get the computer to recognize the phone and LG Flash Tool to the ready stage to flash but after that no luck. Any suggestions? I have not tried fastboot or kdz conversions as I dont think those apply to my problem but I could be wrong
Chris1672 said:
Earlier today I was using my phone I forget what exactly I was doing I think I was using the web browser or opening an app. The phone randomly restarted and after the LG Logo screen appeared I got a blue screen for about 10 to 15 seconds and the screen went off. I pulled the battery to see if that would help but that didn't work. Tried safe mode and even factory reset both times got the blue screen (can get the little menu tho) I then plugged the phone into the computer and initially I could get it into download mode. But after installing the LG drivers, and installing LG Flash Tool I went to flash it back to stock. (My phone has pretty much been stock and unrooted except for the lollipop update. ) When I went to flash the phone screen went blue and the flash tool was unsuccesful at implementing the flash. I also tried the LG Mobile Support Tool. Now intermittently I can get the phone into download mode and get the computer to recognize the phone and LG Flash Tool to the ready stage to flash but after that no luck. Any suggestions? I have not tried fastboot or kdz conversions as I dont think those apply to my problem but I could be wrong
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Click to collapse
what about your phone now? is it fixed or not? i have the same issue. please reply.
sajjadrashid said:
what about your phone now? is it fixed or not? i have the same issue. please reply.
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Click to collapse
I work on phones for a living. Unfortunately, i think the motherboard is bad. Nothing you can do.
Bake at 350 for 10 minutes
bloodstorm666 said:
I work on phones for a living. Unfortunately, i think the motherboard is bad. Nothing you can do.
Click to expand...
Click to collapse
I know this sounds ridiculous but I just did it this weekend and IT WORKS. I pre-heated my oven to 350, removed the motherboard (without sim and/or SD card) and placed it in the middle of my oven on a piece of white paper for EXACTLY 10 minutes. Afterwards, I let it cool and re-assembled. My phone is now working perfectly and I didn't lose any data that was on my phone. I was able to back up my data and am still using it, although I am prepared for it to fail again at any point. I know this sounds absurd but it works. I would post the link but I can't until I've placed 10 posts. I thought this was important enough to share with others and that is why I created an account here. If the moderators look at this please add the link. you can just search Google for "lg g3 blue screen fix oven" and it is the first result right now on forums.androidcentral.com. I'm gonna go ahead and use my phone until it dies again, but for the last 48 hours it has been working flawlessly.

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