LG-G3 VS985 boot certification verify error (Boot loop) - General Questions and Answers

I did search my terms and didn't come up with anything close to my situation, which is this: I got this phone in 2013, rooted it successfully, but was never able to get TWRP flashed properly, but I was happy with the root, so I sort of ignored the TWRP thing. Now I am getting a replacement phone, LG-V20 VS995 next week, so I decided yesterday to tinker around again with TWRP, as I wanted to put this on the V20.
On the G3 when I flashed(Or so I thought) TWRP and rebooted to recovery, I would get an error message (Very small) in the top left of the screen, then would disappear and I would have to pull the battery to reset and then it would boot fine back to the OS, but not to TWRP.
I made sure I had/have the updated Windows LG drivers, ADB, etc.... and I could see my G3 in Windows properly, the internal device and the microSD, I even pulled up the terminal emulator on the G3 while attached to the PC and ran an ID command I think, successfully. I pulled up a CLI in Windows in my ADB directory and my G3 device showed up as well. Then I tried flashing TWRP, first using Flashify; I started with an older version, like 2.8.6, but it didn't seem to work, so I started going towards the newer versions, but still, Flashify kept saying they failed to flash. So I tried the official TWRP app, and it seemed to be doing the same thing. So I went back to review what I had already done, then disconnected my phone from the PC, rebooted normally and tried again with the TWRP app. I think I was successful with one of the newer versions, 3.1.x so I did the reboot after it said it was successful, but I got that boot error message again, then blank screen and red/blue flashing lights; removed battery and replaced, powered on for normal boot and back in the phone OS again. I checked some YT videos on flashing TWRP on VS985 and it appeared I was doing everything correctly, but then I saw this one video that stated to use the Vol+ and Pwr button (I guess I thought when I selected "boot to recovery" the phone was going to do that automatically), then once you see the LG logo, release the Pwr button, then continue to press the Pwr button all while still holding the Vol+ button down, and then you would go into Recovery mode.
His next words sort of came as a shock - you had to select the option to reset your phone to factory defaults, and THEN, and IF you were successful flashing TWRP, it would take you to TWRP. I thought about this and and decided to do another TWRP flash, and if successful, would try this method. I did and I was able to get into the stock recovery menu, and I did see the option to "Reset phone to factory defaults", but decided just to cancel and went back to the phone OS, and that worked. Later on, I decided to try the "Reset" option on another phone boot, but I've now run into a different issue/error. When I boot the phone, I immediately get the error message (The boot certification verify error), and no matter how many times I remove the battery or for how long, each time the phone boots, I get this error message. The only thing I have been able to do is get into the Hardware Key Control Mode using Vol+Vol-Pwr and just continuing to press them. No matter what option I choose, either Cancel, Mode On, or Mode Off, the phone immediately reboots to the error message; it's like it's stuck in the Recovery boot mode somehow. I'm not sweating it too badly, as I've got a V20 coming next week and I have a work cell I can use for important things, but has anyone run into this type of thing? The way it is now, I cannot view the phone on my PC and cannot seem to get past this boot certification verify error.
EDIT: I am now able to consistently boot into the System Recovery by way of Vol+Pwr button held down until the SR menu shows. HOWEVER, no matter what choice I select, phone reboots and I get the "Boot certification verify" error................ oh well, at least I got an email that my V20 is coming this Thursday.
EDIT: I must be somewhat dyslexic, as the method to get to the SR menu is VOL- (Not Vol+) and Pwr button held down until SR menu entry. Sorry about that
EDIT: I've also seen the "fix" where you remove the back cover, battery, and then remove the top plastic cover over the battery/power/volume, then also remove the metal shield. This is the point where it gets confusing; the author(s) want you to "ground" 2 of the contacts, but it's not clear which ones they are referring to, even with the screenshot, and I'm not electrical engineer, so not exactly sure what they mean by grounding. As I'm getting a replacement tomorrow, I decided not to even explore this technique, although I did dissassemble the phone down to removing the metal plate, so I could try and see if I could figure out what they were talking about (I couldn't). Gotta say, I've had my G3 for over 7 years and for the most part, really loved it; it came in handy during home power outages when the Internet (Cable) went out.

Related

Fighting a lost cause?

I've got a rooted (Super SU, but the original root manager was Superuser) LG C800 that I was having problems with. To be specific, I installed some apps on to the system. Some of these apps would be Titanium Backup for root, Avast Mobile Security, ROM Tool Box Lite, Super SU, and a quite a few others. From day one they seem to be kicked right back to my S.D. card, but not all at the same time, and some would stay on the system. I read where I should move the apps back to my S.D. card and try to re-install them on the system minus the data. When I did, the phone went nuts. Now it stays in a restart mode but never fully boots up. Can I salvage it, and if so, please tell me how?! I have tried the hard reset/recovery boot where you hold down the power button, volume, and a few other keys, but it did not work. I'm a broke college student and can't really afford to buy a new phone. I used this one for everything including tethering it to get my assignments done at home and turned in on time. Please help! I'm open to suggestions....... My phone will be completely off. When I plug it into my computer, via U.S.B., it automatically turns it on whether I want it to be on or not. Then it starts off in "reboot recovery" mode, will boot all the way to the point to where the home screen would normally turn on, but then it starts in that "boot loop" all over again but never fully boots up before going back to the beginning of that "boot loop" yet again. I can't even get it to register on my laptop as being plugged in. The reason I took the apps I placed on the system off was because sometimes when I'd re-boot the system the apps would be on the system and sometimes back on my S.D. card without my involvement of any kind other than rebooting my phone. Is completing a Nandroid recovery or re-installation of my ROM even possible with my computer no longer recognizing it as even being plugged in? From what I can tell it won't be. Am I fighting a lost cause or is it salvageable?
Rooted myTouch Q 4G, a.k.a. LG C800
I believe it has a 2.3.4 GRJ22-perf, and then something like 2.6.35.7? I can't remember off the top of my head, and I can't pull it up on my phone anymore or else I'd double check.
Have you tried booting into recovery?
(More about my phone from the original post) Honestly.........I'm not what you may consider technologically inclined. I have however done about as much research online concerning this matter as any one person can do. I've looked it up on all major sites, and many smaller ones too, that post remedies for phone, or "human" if you'd rather, malfunctions. They all talk about still being able to reach a home screen or doing the whole holding the power and volume decrease buttons until I "reboot recovery" screen appears (if that's what you're referring to as doing a recovery reboot as). Don't forget the one where you hold hold the power and volume decrease buttons along with the "A" and "F" keys as well. I even tried one from here where you're supposed to push the genius button after the Android figure leaves the screen. My phone won't allow me to do either. Basically if it's online, I myself, or this girl that's been staying with me, have tried it without any results. On the initial boot the Android figure and the box with the arrow coming out of it show up and it boots until just about the point that it use to switch over to the home screen and it will start the whole "boot loop" over again. The thing is though that the Android figure and box aren't there any other time after the first boot, and with every boot loop it makes after that, the time is reduced from the beginning of the loop to the end when it starts all over again. The phone won't shut off unless I remove the battery and even though my laptop no longer recognizes the device, when I plug my phone into it or another power source and it's off, it automatically turns itself on and begins that boot loop all over again. there is one thing I have yet to try. I read on one site where I could download a custom ROM on my S.D. and then try reboot it, but it never makes it to the point in which the files on my S.D. card are ran, much less scanned. I am still 100% open to any and all suggestions in the diagnosis of this issue. I may record and place a video on one of the more popular "tube" sites to better show or further explain what's happening and then come back on here to post the link?! Feel free to reply back if it's possible you can help before I'm able to complete that later this evening. And thanks for any and all help in advance to everyone.

Dead photon?

Hello, my Photon started acting up really weird. First of all, it was really slow. I thought it's because I had like 150MB left and it was nearly full data-wise. However, I erased most of the data, and left it with 3GB left. Didn't work and it got worse.
I have these stripes around the display (just at sides, not at middle), while phone is turned on. Doesn't matter if in system, or at boot logo. Doesn't matter, because whenever I get to system, I can be in system for like 1 minute, then every application starts crashing (Apex launcher, Google play, whatever you pick) and I basically can't get anywhere. Also if I go to sleep mode, phone is basically dead and it's pure luck when I will turn on phone again. I am trying every few minutes and it's worthless, because any time I get to system anyway, I crash after few seconds.
What to do? I was planing to install custom ROM yesterday, but never got to that, because this all started to act up. So what should I do? Reset system? Any other ideas? Is phone dead?
Sorry for bad english, no bully please.
Thanks in advance
Update - now when I am trying to start up my phone, I have just black screen with white lines in the middle. Then phone shuts down. I will give more info when I will be at home and can get phone on charger
Well definitely try to charge the device up. You might try re-flashing the stock ROM using RSD Lite... Although from your description I fear your issue may be hardware related.
Could turn device on. Apparently that black screen with white lines was just discharged phone. When I put it on charger, I could again boot into system and it was working until I pressed power button to go to sleep mode and phone is again dead. Will try to flash RSD Lite later today and will post what happened
kanek06 said:
Could turn device on. Apparently that black screen with white lines was just discharged phone. When I put it on charger, I could again boot into system and it was working until I pressed power button to go to sleep mode and phone is again dead. Will try to flash RSD Lite later today and will post what happened
Click to expand...
Click to collapse
Charge the device as much as you possibly can before doing anything with RSD. Ideally you should have at least 50% battery in the device when flashing anything.
This is really miserable. I can't really get into bootloader. Because phone after that 'crash' or whatever you want to call it is dead and I can't even see if it's turned on or not. Basically I am randomly waiting when it's gonna restart and then I just get into system. Even if I fully discharge it, it will have black screen with white lines first, it flashes quite couple times and then it will finally boot into system. Also I remember it was ***** in past to get into recovery. Can I do anything from system? Because as soon as I don't turn off my screen by power button, phone is working, though it has those lines on side of LCD (I will try to borrow camera from someone and post it here today).
I set automatic turning screen off for 10 minutes and I am really careful about pressing power button. Sucks there is only option for just 10 minutes, so I have to tap on screen at least for once every 10 minutes or I will not have working phone. **** my life, really.
kanek06 said:
This is really miserable. I can't really get into bootloader. Because phone after that 'crash' or whatever you want to call it is dead and I can't even see if it's turned on or not. Basically I am randomly waiting when it's gonna restart and then I just get into system. Even if I fully discharge it, it will have black screen with white lines first, it flashes quite couple times and then it will finally boot into system. Also I remember it was ***** in past to get into recovery. Can I do anything from system? Because as soon as I don't turn off my screen by power button, phone is working, though it has those lines on side of LCD (I will try to borrow camera from someone and post it here today).
I set automatic turning screen off for 10 minutes and I am really careful about pressing power button. Sucks there is only option for just 10 minutes, so I have to tap on screen at least for once every 10 minutes or I will not have working phone. **** my life, really.
Click to expand...
Click to collapse
Why can't you turn the phone off and charge it while off, or boot to recovery and charge the phone in recovery?
arrrghhh said:
Why can't you turn the phone off and charge it while off, or boot to recovery and charge the phone in recovery?
Click to expand...
Click to collapse
About charging it while turned off - Can't because when I try to turn it on again, it's roulette when I get finally bootloader logo and not black screen with white stripes.
And boot to recovery. Is it possible to like download some command prompt application and boot to bootloader from there? I know when I had my G1 (and when I actually understood android ) you could boot to recovery or bootloader via console. I have astro installed on phone, so downloading some console application and installing it shouldn't be problem.
Btw as we are speaking, I tried to call someone and I basically get same thing like when I am going to sleep mode, I get black screen and now I am just waiting, when phone will eventually want to restart itself.
kanek06 said:
About charging it while turned off - Can't because when I try to turn it on again, it's roulette when I get finally bootloader logo and not black screen with white stripes.
And boot to recovery. Is it possible to like download some command prompt application and boot to bootloader from there? I know when I had my G1 (and when I actually understood android ) you could boot to recovery or bootloader via console. I have astro installed on phone, so downloading some console application and installing it shouldn't be problem.
Btw as we are speaking, I tried to call someone and I basically get same thing like when I am going to sleep mode, I get black screen and now I am just waiting, when phone will eventually want to restart itself.
Click to expand...
Click to collapse
Still sounds like some sort of a hardware issue, is the phone new to you?
You can certainly force bootloader mode, in several ways. When it's off you can hold power + camera and it will give you a choice of what to boot. When it's in Android you can do "adb reboot recovery" or "adb reboot bootloader" depending on where you want to end up. There are various apps which can also do this for you, if you are on the stock ROM but rooted.
arrrghhh said:
Still sounds like some sort of a hardware issue, is the phone new to you?
You can certainly force bootloader mode, in several ways. When it's off you can hold power + camera and it will give you a choice of what to boot. When it's in Android you can do "adb reboot recovery" or "adb reboot bootloader" depending on where you want to end up. There are various apps which can also do this for you, if you are on the stock ROM but rooted.
Click to expand...
Click to collapse
Phone is not new. I bought it used about one year ago.
I am not entirely new to android, but I didn't have android phone for 2 years and then I got this one. So I am really pretty **** with android atm
I will try reboot to bootloader from some console application.
I am rooted, opened bootloader, stock rom
Finally got into recovery, what now?
Also, when I once booted to system, I downloaded some root checking app, and root apparently isn't here. Well cornholio told me it is rooted back when I gave him my phone to perform sim card mod, but whatever. However, I am in recovery, but device is not detected by RSD Lite.
kanek06 said:
Finally got into recovery, what now?
Also, when I once booted to system, I downloaded some root checking app, and root apparently isn't here. Well cornholio told me it is rooted back when I gave him my phone to perform sim card mod, but whatever. However, I am in recovery, but device is not detected by RSD Lite.
Click to expand...
Click to collapse
Well reading back thru this thread, I was suggesting RSD Lite back to stock. I'm not really sure what you want to achieve tho, what your "final" goal is here.
I'm not even sure what kind of recovery you are booted into - stock recovery? CWM?
Either way, if you want to RSD the phone back to stock, you need to boot into fastboot/bootloader mode - not recovery. Just make sure the phone is charged up as much as possible before flashing in RSD.
Oh, sorry - misunderstanding from my side, thought I can switch to fastboot from recovery, oh well.
Also yeah, stock recovery.
To spread more facts - in case somebody would have similiar problems, when I try to just turn phone on, I have zero success what so ever. There's just this blank black page flashing every few seconds. However, when I remove back cover, I somehow force phone to load to bootloader logo, then I finally get chance to force phone to get to recovery. I will try to get to fastboot
kanek06 said:
Oh, sorry - misunderstanding from my side, thought I can switch to fastboot from recovery, oh well.
Also yeah, stock recovery.
To spread more facts - in case somebody would have similiar problems, when I try to just turn phone on, I have zero success what so ever. There's just this blank black page flashing every few seconds. However, when I remove back cover, I somehow force phone to load to bootloader logo, then I finally get chance to force phone to get to recovery. I will try to get to fastboot
Click to expand...
Click to collapse
Not sure if stock recovery has adb enabled, but if you have adb you can 'adb reboot bootloader'.
Otherwise do the power+cam trick I mentioned earlier.
http://i.imgur.com/3XYLngJ.png
kanek06 said:
http://i.imgur.com/3XYLngJ.png
Click to expand...
Click to collapse
Did you remove the getvar lines from the xml file...?
Yes
Weird. I only recall seeing that when people were trying to downgrade... but you are flashing 4.1.2.
The phone is in fastboot mode? What happens when you click "show device"? The "Device Properties" section is eerily empty.
I know it sounds shady, when I am coming back here again in few weeks, just been a bit busy lately, sorry about that.
However, somehow I got phone to flash it. The white graphical lines on sides dissapeared, however I got some new bug - I can't use phone in portrait mode, just in landscape - aka I need to swipe keyboard to have phone working. Also, that thing when phone completely stops working now occurs only when I am in that portrait mode, but I can restart phone this time.
When I finished this, it was midnight so I went to bad, so I tried to set up alarm, if it's gonna randomly shutdown like before and unfortunately, yes it did. I was waken up with this classical white line graphical bug black screen and had to reboot the phone. Oh well, managed to boot to system and it takes 5 minutes to fetch sim card (I have sim card mod from cornholio) and as I said, those white lines on side aka mysterious graphical bug is back.
Unfortunately for me, starts looking like real hardware issue now

Need assistance/info with bricked shield tablet

Received a shield tablet through a promotion my company was doing with nvidia, decided to try it out. (pointing this out ahead of time to let the 'just return it' people know that I cant and am stuck with it.) upon finally deciding to boot it up a couple months later, it booted into the bootloader menu instead of booting like normal. then when choosing to boot would boot into a very stripped version of android with few apps, tegra services repeatadly crashing, no app store/play/etc . I wanted to have the proper out of the box experience nvidia intended, so decided to hunt down a stock factory image to flash to it to just resolve the issue and start from scratch with my new tablet. was able to flash recovery/boot/system/userdata/etc via fastboot. upon restarting, screen went black and wouldnt start. plugged in to computer, device manager says "APX" and that's it. with unknown device/driver icon. if I power it off all the way and plug it back in it just goes back to saying "APX" with a "?" in device manager.
how can I get it out of this mode and booting so I can finally try this thing out? have tried diff combos including bootloader/recovery mode button presses at boot time and nothing works, goes back to the same thing. I've also seen mention about nvflash and some other things when looking into this, but nothing solid on where I get the program, how im supposed to use it to fix my device.
Thanks

[Q] Phone Keeps Rebooting After It Dropped

My girlfriend dropped her phone yesterday and despite that it's encased in a bulky Ballistics case it appears that the power button is broken now. When I plug the phone into my laptop using her USB cable the phone automatically boots up the Google screen with the lock icon, vibrates and then shuts off and reboots again resulting in a boot loop. Unfortunately she's out of warranty. She opened the phone and the iron nub of the power button appears to be unmovable. She also tried going into recovery, but the phone continues to reboot.
Is there any way we can fix this? I read that some people can get theirs repaired at a repair shop, but I'm not sure how viable that is in Canada. Please advise.
Getting the power button fixed isn't too expensive. Hopefully that's all you need. ?
whyareallusernamestaken said:
My girlfriend dropped her phone yesterday and despite that it's encased in a bulky Ballistics case it appears that the power button is broken now. When I plug the phone into my laptop using her USB cable the phone automatically boots up the Google screen with the lock icon, vibrates and then shuts off and reboots again resulting in a boot loop. Unfortunately she's out of warranty. She opened the phone and the iron nub of the power button appears to be unmovable. She also tried going into recovery, but the phone continues to reboot.
Is there any way we can fix this? I read that some people can get theirs repaired at a repair shop, but I'm not sure how viable that is in Canada. Please advise.
Click to expand...
Click to collapse
I have had this issue for the past 4 days. After many attempts of trying to bang the phone a lil onto my hand (for where the power button is located at), sometimes the phone will boot fine, for as long as you do not click the power button again it won't act up.
(I am pretty sure I didn't drop my phone when I was napping in the car, it just started out of nowhere after I have been using lollipop 5.0 with franco kernel for like 2 months without any problem).
Same sypmtoms, bootloop (looked like the power button defective / boot IC on mobo defective), can't even stay on recovery/bootloader screen/system for longer than 5 sec.
Try these :
- spam click power button, until it is able to boot into system, you will have to keep clicking, for every click you either screen on/off you will realize Power Off options may pop up, it looks like the power button has been holded for few sec to trigger the power off, but all you do was spamming the click to keep the button active, you have to click until you feel that certain point the power off doesn't pop up, then stop clicking ( remember never to touch that power button again for NOW), if after a few sec of using the phone and it doesn't force shut down (result from power button defective where it sense its being clicked and hold for like 8-15 sec). Then you are good to carry on whatever I am to tell here.
- go to about phone, click the build number for 5-10 times until you get the unlocked developer mode
- back, click on developer options, enable usb debugging mode (this will pop another message asking you if you want the device to memorise your pc's mac address) that way it is synced with your pc.
- before you proceed with any other thing, go to playstore, download power button to volume button, enable volume power, check start volume power on bootup, check screen off. This will help you greatly for not touching the power button to unlock the screen when you are working on your pc.
- if you have all the correct nexus usb driver installed onto your pc, you need to get Minimal ADB and Fastboot installed onto pc. After installing, run Minimal adb and fastboot, a command prompt windows will pop out and is automatically redirected to the minimal adb folder. key in this command
"adb devices" to see if it detects your device or not. There should be at least a device listed if you have the usb driver installed correctly
- now you can make use of adb commands to reboot into bootloader/recovery to do any flashing of system, backup all your data that you needed to PC. Download official 5.0.1 nexus 5 image and extract it into the Minimal ADB folder.
- is your bootloader unlocked? if not do adb reboot-bootloader
- fastboot oem unlock (this will wipe all your data on the phone)
- fastboot reboot after the wipe is done
After that you can actually carry on with flashing back to stock images. Look at this link http://forum.xda-developers.com/google-nexus-5/general/tutorial-how-to-flash-factory-image-t2513701 for flashing to stock factory image.
I am not sure which step has actually solved my problem, because on my first flashing of factory image, booting into system as a brand new device (no extra softwares, yet to recover any of my data). the problem persists as long as I clicked on power button once, it'll act up again random power off and bootloop.
I actually was on a follow-up cases with google play support team from Aus as my device was bought from Aus. After the last step of factory image setting, doesn't help, I intended to ship it back for RMA as my device is still under warranty and I suspected it was the hardware issues from power button too. They will send me another refurbished device. After ending the call, they sent me link to proceed with warranty claims where I need to fill in several forms and ship the device back to them.
I decided to give it one more try, due to my phone was previously unlocked, rooted, changed to franco kernel.
By restoring to stock images made my device unroot, I was afraid of google will accuse me for unlocking bootloader voided the warranty and not willing to replace another unit for me. I locked back the bootloader, then I remembered in bootloader, fastboot oem device-info shows that a record of a phone if it has been unlocked, it will show Tampered status as True, google probably can use that to track if a device has been unlocked before. So I unlocked my bootloader again (which causing another wipe for whatever data is in the device).
So I looked up on google again and found source for changing that tampered status to False in addition to locking the bootloader again, but to change that tampered status, I need to use TWRP to run the scripted zip file, so I used fastboot boot path (it is stated in the link I gave you above) to boot into TWRP images temporarily from my desktop and ran the zip file, I always practice wiping data, cache and everything before I boot the device back into a brand new factory image.
So I went to wipe dalvik cache. Rebooted the system - it was running the Optimizing x numbers of Applications.
Upon finished with that. I was surprised that, after a few clicks of power button, the random power off issues is no longer there. I even test clicking on the power button for entire day. The symptom isn't coming back. So I emailed google play support team to cancel my warranty ticket and close the case for now.
Should there be any problem again I will probably then claim the warranty for replacement.
Its been more than 24 hours now that I am using the device without any problem of random power off and on or stuck in bootloop due to power button defective.
I suspect it is either the 5.01/5.0 lollipop with ART that is causing something wrong with the boot IC / power button defective in a long run.
Or maybe it was some settings I have changed in franco kernel ? but it was running fine for 2 months which made me doubt that it is franco kernel
Or it could be some of the apps I used to tweak my phone settings - LLama and tactile player (which I have set something condition and actions for power button) but I doubt it is caused by these either.
I will observe and see if the problem comes back after some time of using the 5.0.1 stock image now.
Oh I am also back to using franco kernel, unlocked bootloader and rooted again. Haha...
Hopefully you are able to solve the problem by trying some factory reset method + wiping cache, partition and dalvik.
If not, you probably may have the hardware issues, I have seen some other forum/websites with n5 users upon replacing the mobo, no longer encounter such problem.
Regards,
Kean
Thanks for the replies. My girlfriend was able to get the power button repaired for $80 and replaced the external button for $7 + tax, she paid $98. At least it's cheaper than a new phone.

Can't boot, restarts constantly

Bought a Nexus 5 about 6 months ago USED. It has been amazing. I got the latest OTA a week ago or so, not sure if that has anything to do with current issues.
About 2 days ago started randomly restarting. Today, it shut down and has been in continuous loop restarting. I see "Google" and maybe even the boot dots loading, then it is off. Three seconds later, starts again and repeats. Never makes it all the way into Android system. I let it sit for a while and when I pick it up, without touching any buttons, it repeats all of this. I suppose it is probably dead in general, but I don't know. Do you guys have any ideas? Again, I bought it used and from a ma/pap store who said they buy 100 in bulk, which made me skeptical, but they also had a 60 day guarantee and it was amazing the first 60 days and even after. It has been error free for 6 months, so I don't know if this is just a random issue or if the previous owner dropped it in a lake and I got lucky, or what. FWIW the damn thing has been in a case and never dropped, so it isn't anything that I have done I don't think. Thanks for any help.
edit: never rooted, never messed with, always been stock
Another user reported some instability since the last OTA update.
Flashing the full factory images did the trick.
a friend of mine gave me his nexus 5 to repair and its doing something similar. He had ir rooted and on latest 5.1.1 (i think). Either way, he said it was randomly locking up and rebooting. When i got it it had the red blinking light when plugged so i got a new battery. That got fixed but then the constant bootloop showed itself. I flashed TWRP (many versions, 2.6.3.1; 2.7.1.1; 2.8.7.1; the one that worked best was 2.7.1.1). So, once in twrp wiped, pushed cm 12 snapshot, flashed it, pushed gapps, falshed, pushe supersu flashed. Started the system. That precise order of things (ie: pushing flashing, then pushing something new and flashing it) was what gave me best results to actually boot up at least once. Once booted up and logging in and everything to cm i had some sort of stability (even rebooting and powering off) but i think that everything went wrong when i plugged the phone to the computer and it was back to bootloops and not even getting to the recovery. Flashed everything again. Didnt work. Had to leave the phone sit for a while (without the back casing) before trying again, in order, before getting any success. Im starting to think of ovrheating but it doesnt even get that hot...
Dunno if you guys have any ideas on this. Or if i can give you mor details to help us out.
Regards!
Looks like I'm having a similar problem to what is described here, as well as http://forum.xda-developers.com/google-nexus-5/help/bootlooped-dont-how-to-enable-debugging-t3215951
I've had one of my Nexus 5 phones running OmniROM 5.1.1 for some time now, very stably. After trying out the Marshmallow preview and going back to that ROM, I started having spontaneous hard reboots and hard crashes. The phone would often boot loop before even getting to the OmniROM boot animation. It was also very recalcitrant about entering and staying in the boot loader, rebooting spontaneously shortly after rendering the boot loader screen. I was occasionally able to "grab" control long enough to get it to boot into TWRP, from which a boot to Android seemed to usually get it out of the loop and into running Android.
I've flashed back the boot loader and baseband from factory-stock 5.1.1 LMY48M (HHZ12h and 2.0.50.2.26) using the flash-base.sh script from a freshly downloaded and extracted hammerhead-lmy48m. Things appeared to be OK last evening and this morning, but things got worse today.
Now the phone is in a state where it is not responsive to the power button when unplugged. I can hold it down for 30 seconds with no response.
If I plug in USB, it spontaneously starts rebooting, not showing more than about two seconds of the Google boot loader screen. If I hold the down-volume button, I can get the boot-loader screen, but no matter how fast I try to be, I can't select anything more than "Restart bootloader" (or "Power off") option before it spontaneously reboots (to boot loader).
As far as I know, the battery had a significant charge before this started happening.
I see the same behavior if the phone is connected to a USB charging source, rather than a USB port.
I've tried pulling the SIM, but that doesn't change the behavior.
adb wait-for-device never returns, so poking it over adb doesn't seem to be an option.
fastboot devices also doesn't see the phone, for the brief time the boot loader is running.
Any suggestions on how to get this into the boot loader so I can at least re-flash it?
Nexus 5 D820(E) 32 GB
Edit:
WaxLarry said:
In my opinion your problems seems power button's related.
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Click to collapse
Trying to see how I can "clean" or "clear" the power button now.
Edit:
Paul22000 said:
This morning my Nexus 5 was turned off all of a sudden after not having used it for 20-30 minutes. I held the power button and nothing. I plugged it into power and the "Google" screen appeared. It then went into a reboot loop on and off, on and off, on and off. I held the Volume Buttons and it went into fastboot, but then boot looped out again and again. Searching on Google yielded that this was indeed a common problem. [...]
Click to expand...
Click to collapse
Edit: Repeatedly pressing the power button seems to have temporarily allowed a boot to Android.
In retrospect, I had noticed over the last few days that the phone didn't seem to respond properly to the power button, either "ignoring" it, or when a second press got things started, it would unexpectedly come up with the long-press-volume menu.
One link on how to replace the power switch yourself is http://protyposis.net/blog/replacing-the-nexus-5-power-button/
Ok @jeffsf keep going on this thread. I had the same damn experience, that ended with RMA. LG said that the problem is related to some tension change in the power button. After the RMA I used the phone totally stock and never had a problem. Two months ago I switched to blu_spark kernel and some weeks after i noticed some problem. When I pressed the button to lock the screen, phone locked itself and then screen turned on, sometimes showing the shutdown option. So i understood that something was happening to the power button. I tried to overvolt with a +5mV on general offset and since then i never had problem. If you can enter recovery or bootloader i suggest you to flash some kernel with volt change support and then overvolt the general offset... and keep finger crossed
jeffsf said:
Looks like I'm having a similar problem to what is described here, as well as http://forum.xda-developers.com/google-nexus-5/help/bootlooped-dont-how-to-enable-debugging-t3215951
I've had one of my Nexus 5 phones running OmniROM 5.1.1 for some time now, very stably. After trying out the Marshmallow preview and going back to that ROM, I started having spontaneous hard reboots and hard crashes. The phone would often boot loop before even getting to the OmniROM boot animation. It was also very recalcitrant about entering and staying in the boot loader, rebooting spontaneously shortly after rendering the boot loader screen. I was occasionally able to "grab" control long enough to get it to boot into TWRP, from which a boot to Android seemed to usually get it out of the loop and into running Android.
I've flashed back the boot loader and baseband from factory-stock 5.1.1 LMY48M (HHZ12h and 2.0.50.2.26) using the flash-base.sh script from a freshly downloaded and extracted hammerhead-lmy48m. Things appeared to be OK last evening and this morning, but things got worse today.
Now the phone is in a state where it is not responsive to the power button when unplugged. I can hold it down for 30 seconds with no response.
If I plug in USB, it spontaneously starts rebooting, not showing more than about two seconds of the Google boot loader screen. If I hold the down-volume button, I can get the boot-loader screen, but no matter how fast I try to be, I can't select anything more than "Restart bootloader" (or "Power off") option before it spontaneously reboots (to boot loader).
As far as I know, the battery had a significant charge before this started happening.
I see the same behavior if the phone is connected to a USB charging source, rather than a USB port.
I've tried pulling the SIM, but that doesn't change the behavior.
adb wait-for-device never returns, so poking it over adb doesn't seem to be an option.
fastboot devices also doesn't see the phone, for the brief time the boot loader is running.
Any suggestions on how to get this into the boot loader so I can at least re-flash it?
Nexus 5 D820(E) 32 GB
Edit:
Trying to see how I can "clean" or "clear" the power button now.
Edit:
Edit: Repeatedly pressing the power button seems to have temporarily allowed a boot to Android.
In retrospect, I had noticed over the last few days that the phone didn't seem to respond properly to the power button, either "ignoring" it, or when a second press got things started, it would unexpectedly come up with the long-press-volume menu.
One link on how to replace the power switch yourself is http://protyposis.net/blog/replacing-the-nexus-5-power-button/
Click to expand...
Click to collapse
I got a notification for this post since you quoted me. I'm not sure if you're having the same problem but I'll tell you what happened to me, just in case. I called T-Mobile and they referred me to the nearest 3rd party phone repair shop. I went there and after an evaluation, the repairman told me the power button on my phone was indeed broken. They replaced it for $55.
The story doesn't end there though. I took my phone home and a few hours later I tried to use bluetooth and it didn't work. I took it back and found out that unfortunately, when the guy replaced the power button, he inadvertently broke the bluetooth. There's no way to fix bluetooth without replacing the motherboard entirely, which would cost $200. I'd rather buy a new phone at that point since my Nexus 5 was getting old. He refunded me, which was nice. At least the power button worked so I could use my phone. Bluetooth isn't as valuable as being able to you know, turn on the phone, so at least it was a net gain.
After that, I purchased a Nexus 6 and rooted it so I could use double-tap-to-wake (along with the automatic screen on when you pick up the Nexus 6). I also use the following app in order to turn off the screen by swiping up from the home button (I don't care about losing the shortcut to Google Now): Screen Off and Lock
I can now literally go weeks without using the power button on my Nexus 6. (I literally only use it when tap to wake sometimes becomes unresponsive which is rare.)
Bottom line: I will never buy another phone without tap to wake functionality! :good:
A local repair shop here indicated that one sometimes does changing the power switch resolve the issue. They have seen situations where the issue appears to be one of the power-management ICs. Just something to be aware of when examining the potential cost of a repair and who you would have do the work.

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