Hi, background is this..
I have a D802-10C G2 that i rooted the stock 4.2.2 rom a while back using the post chinese method. Easy enough, all worked fine. no complaints. A couple of weeks ago i got offered the OTA 4.4 update, this failed due to the root. I then removed the root using the feature in super su. that seems to have worked as no apps or file managers etc could get root access. However, the OTA still wont work.
Now my problem is my phone will no longer be recognized by any operating system, on multiple computers. I have tried many ADB drivers, Windows 7 wont even detect the device, i've used every PC connect mode, USB debugging. However always the same result, it's as if i'm plugging in a blank usb cable into the computer. Nothing at all.
The only thing that does happen when i connect the phone to a computer is the phone starts to trickle charge. There is nothing detected in Device Manager in Windows 7 I've tried connecting in download mode, nothing. I've tried the LG support tool, PC sync. Nothing.
WiFi does connect to the PC suite fine BTW and other than that the phone is working perfectly. I've also tried connecting multiple usb cables on multiple ports.
I haven't been able to find a single case of the same problem in the week or so i've been looking. Hoping someone can help, i'm thinking i may have soft bricked my phone. I really do not think this is a driver issue.
Any help would be great. cheers
Paul
+1
i have the same problem plz help
cambies said:
Hi, background is this..
I have a D802-10C G2 that i rooted the stock 4.2.2 rom a while back using the post chinese method. Easy enough, all worked fine. no complaints. A couple of weeks ago i got offered the OTA 4.4 update, this failed due to the root. I then removed the root using the feature in super su. that seems to have worked as no apps or file managers etc could get root access. However, the OTA still wont work.
Now my problem is my phone will no longer be recognized by any operating system, on multiple computers. I have tried many ADB drivers, Windows 7 wont even detect the device, i've used every PC connect mode, USB debugging. However always the same result, it's as if i'm plugging in a blank usb cable into the computer. Nothing at all.
The only thing that does happen when i connect the phone to a computer is the phone starts to trickle charge. There is nothing detected in Device Manager in Windows 7 I've tried connecting in download mode, nothing. I've tried the LG support tool, PC sync. Nothing.
WiFi does connect to the PC suite fine BTW and other than that the phone is working perfectly. I've also tried connecting multiple usb cables on multiple ports.
I haven't been able to find a single case of the same problem in the week or so i've been looking. Hoping someone can help, i'm thinking i may have soft bricked my phone. I really do not think this is a driver issue.
Any help would be great. cheers
Paul
Click to expand...
Click to collapse
YOu can try checking the device manager or use other USB port on your phone.
buenarc said:
YOu can try checking the device manager or use other USB port on your phone.
Click to expand...
Click to collapse
The problem is not like the usual ones you will see about "computer not being able to see device" I don't think it's a driver or software issue, or if it is it's unlike any i have found in the weeks i've been searching the net for a solution. Here's why....
When i connect the phone to Windows 7 and 8 ( on 3 different computers) No hardware is detected, nothing in the Device Manager, no yellow question marks indicating 'Unknown Hardware'. Nothing, all it does is start trickle charging.
Now even with no ADB, or any driver at all installed, the computer should still detect the phone. Mine does not.
The same thing happens using OSX and Linux Mint 16 (again multiple computers) No devices or mounted or volumes shown at all. Linux terminal command "$ lsusb" does not list my hardware.
This is why i'm pretty much convinced that there is something wrong with the USB port on the phone. Because, if Linux can't see it then surely it's a hardware problem right?
The only other thing i can think of is, i have messed up the phones firmware while trying to unroot it? but only because the timing of all this is just too uncanny.
I think i'll have to suck it up and admit defeat here. Funny thing is the phone works perfectly and charges fine.
Stuck on 4.2 , with no ADB functionality. Perhaps i'll sell it cheap to someone who doesn't care.
Cheers for the reply mate.
Same problem here!
Only my G2 is not rooted, it is still on factory OS and recently updated to 4.4.2.
I have tried on several computers, different ports and no help.
On the first connection to a PC not connected before windows reports "USB device not recognized" problem.
After that every time I connect the phone to the same computer the phone itself only recognizes that it is using USB charging mode, it does not recognize the computer connection (known by the USB ison on android system tray) even with "Ask upon connection option checked".
Even when I manualy change the Android mode in Settings --> PC Connection from MTP to PTP or even LG software, nothing happens.
Definetly there seems to be a problem with the phone, but I don't beleive it's a software but a firmware problem.
Please help if anyone knows what to do.
same thing happened after installing T-mobile rom thrugh twrp. but my device boots into fastboot and i tryed falshing :
laf.img, boot.img, aboot.img, recovery.img, laf.img
but after reboot my LS980 dissapear from device manager and stucked on LG logo.
Dont know what to do now.
I'm no expert, but given there are a lot of them here and none have weighed in on this with any ideas for a fix, i'm going to assume it's a hardware problem.
Anyone else agree? Hardware problem not software?
Cheers
I guess that you already wiped everything right? Apart from that, i'll suggest you to go to some tech supp and ask them if they can verify that each pin of the micro usb is properly working.
Sorry for my english, hope it helps!
Sent from my LG-D802 using XDA Free mobile app
I will try to check the connector although i dont think that it is a hardware issue.
BTW I can enter the download mode after flashing the mentioned partitions and i can also enter the stock LG recovery but when i do the factory reset it keeps showing Factory reset processing ... for ever
It has happened to me the same thing :crying:, and is a problem with the boot.img, if by chance your G2 version 4.4.2 and the the 4.2.2 boot.img, goodbye.
The only solution is to take it to repair a service official, there will change you the card, with the consequent change of IMEI.quent change of IMEI.
Homero2 said:
It has happened to me the same thing :crying:, and is a problem with the boot.img, if by chance your G2 version 4.4.2 and the the 4.2.2 boot.img, goodbye.
The only solution is to take it to repair a service official, there will change you the card, with the consequent change of IMEI.quent change of IMEI.
Click to expand...
Click to collapse
where are you going to repair your G2?
and how much have you paid the repair?
THANKS
Any fix for this guys i have same problem!
Here I'm getting the yellow !, any suggestion?
Sirs, I flashed the baseband (https://www.androidfilehost.com/?w=files&flid=12880) then it got working back.
solved for me
I have some kinds of that problem, let try:
Settings -> General -> PC Connection -> Select USB connection method -> Media device (MTP) (or whatever)
Got this same issue after flashing cloudy g3 rom. Then later flashing dirty unicorns, which requires jelly bean baseband. But even restoring g3 and 24a baseband, still doesn't work. No pc tethering and no on the go usb. My usb port is basically charge only.
---------- Post added at 03:58 PM ---------- Previous post was at 03:56 PM ----------
Everything else works fine...I actually never even noticed this bc I never tether to pc. But now I have to bc I want flask kdz
Help me please
someone have a solution to this problem?
My Lg G2 D803 still on boot loop (LG logo) and thats all ... no usb connection , reset factory doesnt work ...
HELP PLEASE ...
Thank you
Anyone has an idea how to fix this problem?
same problem
I have a LG G2 . recently updated from vs98027a to vs98039a 5.0 lollipop. Since the update my computer won't recognize my device in download mode and I don't have superuser ppermissions. Help plz
I also have the same problem.
It happened when I tried to backup info through LG PC Suite: the phone disconnected during the process, and now it's not recognized by any PC (http://forum.xda-developers.com/lg-g2/help/lg-g2-recognized-windows-backup-t3155323).
Also found a description of the same problem here: https://www.reddit.com/r/lgg2/comments/2urpnw/lg_g2_usb_only_charging_not_recognized_by_pc/ - no solutions, too.
Did anyone manage to fix this?
Hi all, i have a my sad story and a little of hope to get help from you.
Firstly i have bought LG G2 D800 at ebay, seller warn me that it is rooted, but due to android devices is new to me, i have no pay attention to it.
After couple days of using I received and notice to update software for my device from AT&T manufacturer and without hesitation it was accepted.
To my surprise but not for the rest advanced android users i got boot loop with LG logo and after heavy digging of internet i have found the way to fix it.
The instruction is this
My fail to this instruction was that i had downloaded sbl1.img, aboot.img, rpm.img, tz.img with 9Kb size with same crap code inside for each file and drop them to my D800 using ubuntu. When i pool out data cable the screen goes down and nothing else. Ubuntu is not recognize partitions anymore. Then after all it i realize what was happen.
Current situation is:
Due to i'me new to unix systems i'm not see any activity that ubuntu is detect my phone or anything that can tell that its not dead at all while i plugin data cable.
As for the windows when i plugin data cable its recognize in Device Manager my D800 as 'Unknown device' under USB section.
When i hold for awhile power button without cable and then release it and then hold volume up when plugin cable then windows recognize it as QHSUSB_BULK under Other Devices or under Ports (COM & LPT). No any disk mounting appears as when it was during boot loop problem.
Display, leds, speakers of the phone does not do anything, not even black screen, looks like it has power off.
This post is last hope to bring the phone alive. I assume if there is any chance to fix it to get back and place correct files to my device.
I also assume if there any android or else code to place to usb flash drive to use it with OTG cable. I sow a video where samsunge galaxy was used with some device (i assume it was usb flash drive with some code inside) and dead phone screen appears with android logo...
My phone is LG G2 32Gb black with installed KitKat 4.4.2
Please help me. I will be very gratefully for any help.
Thank a lot.
magnus-deth said:
I also assume if there any android or else code to place to usb flash drive to use it with OTG cable. I sow a video where samsunge galaxy was used with some device (i assume it was usb flash drive with some code inside) and dead phone screen appears with android logo...
Click to expand...
Click to collapse
It seems it was an usb jig, if so is it works only for samsung?
Does the story about usb flash drive with an Android OS installed on it+OTG is fantastic for dead phone in my case?
I have an AT&T Note 3 SM-N900A. I Installed X-Note Rom on it a while ago, but I recently have been having problems charging the phone and was going to take it to an AT&T Device Support Center to fix it. I tried to install the stock firmware N900AUCBMI9 using Mobile Odin, only to see the a boot up screen that says "System Software not authorized by AT&T has been found on your phone . Please turn off your phone and go to the nearest AT&T store for help." I tried to get the phone to connect to Odin on my Windows PC, but the computer will only say USB Device not recognized, and it won't show up in Odin at all. The weird thing is that it says USB device not recognized even while the Note 3 is off. The phone also stays on while in Download Mode when connected to USB with no battery.
I was wondering if there's anything I can do to at least ensure that the people at AT&T can't power up the phone and see this message. I should have just left it on the custom rom, this looks way worse. I'd rather have a hard brick at this point, at least they wouldn't be able to see it was rooted and flashed. I really screwed this up, if I knew I'd be having issues I would have never rooted it. Any help would be extremely appreciated. Thanks for your time.
Hello!
My LG G2 (D802, stock, unrooted, Android 4) never showed an OTA update to Android 5 - that's why I tried to find the update through LG PC Suite. Installed the software, connected my smartphone (the drivers installed OK and it was recognized rather fast), and it really showed that I could update to the next firmware version (Android 5). But I decided to make a backup first (also through LG PC Suite). At first, everything was OK, but after a while the backup program told me that the phone disconnected unexpectedly and asked to reconnect it. I did, but it was not recognized by computer (was only charging, "slow charging", to be precise). I restarted my PC, my phone - still no luck. I reinstalled the drivers and followed all the common advice found on forums, but still my phone was only charging from PC (choosing any connection option in its menu or checking USB debugging did nothing). I also tried to connect it to another PC (Win8 - the 1st one was Win7) - also only charging without even trying to install the drivers. That's why it seems to me, that the problem is on the smartphone side. But what could happen during the backup process? The phone is still charging - so mUSB port isn't "burnt" or something... What can I do to fix this? Please, help!
I was trying to fix a camera issue while on holiday with my phone but accidentally wiped some partitions during the rewrite of my rom my dad pulled the cable out and now my phone is totally unresponsive. If I plug it into my windows 10 laptop I get a device descriptor request failed error and I am unable to fix it. From reading an article on androidbrick I would post a link but I don't have enough posts it looks like it should show up as a com port but it does not for some reason all the drivers are installed and I have tried forcing the driver onto the device and it won't accept them. The fix I need is a way to get the com port to display so I can reflash and program the bootloader. I am still on holiday so currently have limited equipment basically the phone, usb cable and my laptop and sometimes wifi.
Any help would be appreciated a this issue is driving me crazy. :crying:
bobthemac said:
I was trying to fix a camera issue while on holiday with my phone but accidentally wiped some partitions during the rewrite of my rom my dad pulled the cable out and now my phone is totally unresponsive. If I plug it into my windows 10 laptop I get a device descriptor request failed error and I am unable to fix it. From reading an article on androidbrick I would post a link but I don't have enough posts it looks like it should show up as a com port but it does not for some reason all the drivers are installed and I have tried forcing the driver onto the device and it won't accept them. The fix I need is a way to get the com port to display so I can reflash and program the bootloader. I am still on holiday so currently have limited equipment basically the phone, usb cable and my laptop and sometimes wifi.
Any help would be appreciated a this issue is driving me crazy. :crying:
Click to expand...
Click to collapse
Sorry as this may be not much of a help to you but rather my experience with pretty much the same situation.
I couldn't turn on the phone and there were no signs of life when connecting it to a PC (only a message that USB was not recognized with the same description as you mentioned - device descriptor request...).
I tried to connect the phone on different PCs with different OSs (from XP to Windows 10), different drivers/tools, but there was always the same USB error displayed.
Eventually, I had to return it to the service center (it was under warranty) but they couldn't repair it, so luckily they sent me a new one