Hello
E recently bought an LG Optimus Black (P970). It had stock rom 4.0.4 and the guy told me that it has CWM recovery on it, but i never tried.
It was working well, but one day it started to freeze quite often. One day i inserted another sim card than the one i was using before and it freezed. Restarted the phone but it froze again. The third time it didn't even boot, but instead the green android appeared with his belly open and the exclamation mark hanging out of it.
I tried a factory reset, but the process lasted more than 15 minutes so i turned off the phone.
Since then, when the phone starts the following happens: LG logo appears, Android guy appears with the loading sign in his belly and after 3 seconds the lg logo again.
I was able to access the SWUpdate menu and to flash a stock ROM with LG MobileSupportTool. When the update process ended with success, the phone should have restarted itself but it didn't. Instead the lg logo appeared again.
Trough the SWUpdate menu i managed to flash other stock ROMs on it with the SmartFlashTool but the same thing happened as before. (Successful flash, but the phone didn't restart. I even managed to flash a ROM on the device which had CWM recovery patched to it.
After this i created myself a 3in1 service cable with 56kohm,130kohm,910kohm resistors. I managed to access the SWUpdate menu with it, so i knew the cable was good. But i couldn't read from the device with CDMA tool. CDMA made the connection, but couldn't read.
I took the phone to the service, but they told me that the phone didn't respond to the JTAG either. They assumed that the motherboard is broken.
I didn't make peace with the idea that the motherboard is broken. I need help. Currently my only option is the take the phone to another service and hope that they are more capable than the previous ones.
Thank you in advance.
If anyone can advise me here I will be very grateful. I have spent several days looking online and reading countless threads here but am still not having any joy. Am a bit of a noob so go easy on me please!
I have a rooted LG D618 running Lollipop (recently upgraded itself from Kitkat). Long story short, I was fiddling around with the bootloader trying to install a custom recovery (ahem... ) and I ended up bricking the phone. I have been trying since then to install the original firmware using LG Flash Tool 2014 and it always stops on the 4% mark whilst extracting the kdz. I have tried this about a hundred times and the same thing happens every time. The phone is completely dead, I can not switch it on and I am unable to boot it into Factory Reset mode using the keys either. But it is still being recognized by the PC (win7 x64) and can enter (what I assume is) download mode. However in Windows the phone is recognized as removable disk containing 2 folders - 'image' and 'verinfo'. Not sure if that is normal or not? I am able to start the kdz flashing process and it goes through the first couple of steps verifying connectivity etc and then stops at the aforementioned 4% during the file extraction process, sticks for a while, and then gives me an error message.
I tried a solution which I found on the forum here, which I think was for the same issue, involving the wx.dll file in C/ProgramData/LGMOBILEAX/phone but this has no effect. I thought it might be related to me installing the KitKat kdx (v10c) onto the phone but I have since tried flashing the stock Lollipop variant (v20b) also and the exact same thing happens so am guessing it is not because of the KitKat wx.dll file causing issues. I am pretty clueless here, all of this is unchartered territory for me and I am out of my depth so if any kind soul here can advise me on any possible solution I am willing to try anything before admitting defeat, and taking the phone to LG to fix under warranty and hoping they don't realize that I broke it. :laugh:
I keep getting a message on the LG startup screen, that says,
"secure booting error
cause: boot certification verify"
My phone was rooted using king root almost 6 months ago, and I had no problems with it. Until around a month ago, it started getting real slow and apps would randomly stop. So I decided to format the phone. There weren't many problems after that. but after a while it started getting slow again, but slower than the first time. One day almost every app closed and "LG Home" would close, it would give me some kind of error. I turned it off and tried turning it back on, but that's when I got that error. At first i thought my phone was bricked, i still sort of do, so I tried several methods. I can only turn the phone on in download mode, and my computer recognizes it as an android device.
At first I had some problems because i couldn't find my right .KDZ file, I used KDZ Update and I tried using LGFlash tool, but i can't find any of the files (.bin . dll) I need. I've also tried using the 2014 version of the LGFlash and used the LG Mobile Support tool, and nothing! They all take around 4 to 5 hours to finish!!! It never says there's an error or anything, none of them do! They always finish successfully, but the same thing keeps happening. Every time the phone reboots, it gets stuck on the LG logo and i get the secure booting Error!! What else can i try? Any suggestions? Am i missing something? All drivers are installed correctly and I've tried on windows 7, 8 and 10! Is there anybody who can help me? What do you think the problem could be? What causes the "secure booting Error!"??
First off, I appreciate any input on this very much.
The phone is an LG K8 2017, or model US215, and this is actually the second time this has happened on a second device. Both times this has occurred, it's been during charging.
The first time, on the first device, the device was off when I took it off the charger, and would not power on until I removed and replaced the battery. Later that day, the device seemed to be lagging, so I rebooted it, and was taken to the fastboot screen. I Googled and Googled, and corresponded with LG before taking the phone back to the retailer and exchanging for another, as I'd only had it a few days.
Now, with the second device, which I've been using for several weeks, there were a couple of times that the phone was off after charging, and the battery had to be removed/replaced to start it. This time, the phone was (maybe for the third time) off when I removed it from the charger. Fearing the same issue, I removed/replaced the battery, and unfortunately, was met with the fastboot screen. LG will repair it under warranty, but I don't have a backup, and can't go weeks without a phone. I've searched high and low, and cannot seem to come up with an answer, or find a situation identical to mine.
I've tried fastboot reboot with ADB, but it requires USB debugging to be enabled on the device, which mine was not, and I'm not able to access it now. The phone was completely stock. Hard-reset does not work, as it always boots back to the fastboot screen. I am, however, still able to access this screen, and download mode. I've tried to include as much info as possible, but am eagerly awaiting responses, so I can answer any questions. Again, thank you to anyone with input!
Hi dude , try to flash with LG flash tool
This guide will help you and it's easy to follow .
https://www.mylgphones.com/how-to-unbrick-restore-lg-k8-as375-back-to-stock-with-lg-up.html
Download firmware for your region here :
https://lg-firmwares.com/lg-us215-firmwares/
Good Luck
Teddy Lo said:
Hi dude , try to flash with LG flash tool
This guide will help you and it's easy to follow .
Good Luck
Click to expand...
Click to collapse
Thank you for the response! I see the link for the firmware, but I'm not sure what guide you're referring to?
[EDIT] I think I found it. Will update after I follow the guide.
Unfortunately, LG Mobile Support Tool just tells me, "The phone is disconnected from the PC." Even in download mode.
The only time the PC seems to recognize that the device is there is when it's on the fastboot screen, however, LG Mobile Support Tool still gives me the same error.
lg k8 lgus215 2017 model
16Patriot said:
First off, I appreciate any input on this very much.
The phone is an LG K8 2017, or model US215, and this is actually the second time this has happened on a second device. Both times this has occurred, it's been during charging.
The first time, on the first device, the device was off when I took it off the charger, and would not power on until I removed and replaced the battery. Later that day, the device seemed to be lagging, so I rebooted it, and was taken to the fastboot screen. I Googled and Googled, and corresponded with LG before taking the phone back to the retailer and exchanging for another, as I'd only had it a few days.
Now, with the second device, which I've been using for several weeks, there were a couple of times that the phone was off after charging, and the battery had to be removed/replaced to start it. This time, the phone was (maybe for the third time) off when I removed it from the charger. Fearing the same issue, I removed/replaced the battery, and unfortunately, was met with the fastboot screen. LG will repair it under warranty, but I don't have a backup, and can't go weeks without a phone. I've searched high and low, and cannot seem to come up with an answer, or find a situation identical to mine.
I've tried fastboot reboot with ADB, but it requires USB debugging to be enabled on the device, which mine was not, and I'm not able to access it now. The phone was completely stock. Hard-reset does not work, as it always boots back to the fastboot screen. I am, however, still able to access this screen, and download mode. I've tried to include as much info as possible, but am eagerly awaiting responses, so I can answer any questions. Again, thank you to anyone with input!
Click to expand...
Click to collapse
I have the same problem id like to no how to fix it.
How do you actually go in fastboot mode?
I can`t and i can`t.
the phone is fully working but has google account lock on.
I have tried https://www.hardreset.info/devices/lg/lg-k8-2017-m200n/fastboot-mode/
thanks in advance
Hello all, got a bit of a strange issue here. So I was using the 30b release from runningnak3d, https://forum.xda-developers.com/tmobile-lg-v10/development/h901-t-mobile-nougat-v30b-twrp-t3639203
I was selling my v10, so I did a reset, skipped or hit next to everything, and verified that all was working. I sold the phone and a couple days after the buyer got it, he told me it was bootlooping. I asked what he did and of course the first time he said nothing, just turned it on. After more conversation, he said when he got it it booted and after a while told him an upgrade was available. He said he accepted the upgrade, and afterwards got the bootloop.
I got the phone back today to try to fix it and give it back to him. Here's what I have found. Definitely bootlooping, stops at T-Mobile logo and reboots. It does still have the unlocked bootloader, still shows the warning right at boot. TWRP is gone! I booted to recovery, answered Yes to those 2 questions, and it did a reset instead of loading TWRP.
I really have no idea what he did, whether is was an OTA update or maybe he tried to load something on his own.
So, is there any hope of getting this thing going again? So far I was able to boot it into download mode, but it won't respond to any fastboot commands. My computer detects it, but in computer management it says LGE USB modem or something like that. When I try to regular boot, the computer does detect the phone, but it doesn't get far enough along to issue ADB commands. I'm thinking it's a paperweight at this point, so I'm game to try whatever.