ADB devices unauthorized. No touch, no LCD how to connect to monitor - G Pad 10.1 Q&A, Help & Troubleshooting

Hello my friends can someone help me with my problem? I have a LG G pad 10.1 v700 with broken/missing touch screen and LCD and I want it to connect to my monitor with vysor and/or [email protected] The problem is that I need to accept dialog windows when appears on my tablet when connecting to vysor, but i cant for obvious reason. I have installed ADB universal drivers, LG drivers, Android Studio and am trying with adb commands like "adb devices" to make some connection with my tablet but it says that my devices is unauthorized and don't accept adb commands at all. I read over the INTERNET that i need to boot in TWRP mode and than I can use adb commands there without authorization. I have previously installed TWRP recovery and also debugging mode is enabled, but when i am supposedly in TWRP mode (I don't hear LG boot sound sometimes after Power + Vol down button combination) my tablet doesn't recognize at all from Windows 10 and "adb devices" command show "error: no device". Can you help me?
My tablet is with android Kit Kat, rooted, Debugging mode is enabled, TWRP is installed
In Windows Device Manager I see in Android Devices - LG ADB interface, also in Portable Devices - V700

sinan.ismailov said:
Hello my friends can someone help me with my problem? I have a LG G pad 10.1 v700 with broken/missing touch screen and LCD and I want it to connect to my monitor with vysor and/or [email protected] The problem is that I need to accept dialog windows when appears on my tablet when connecting to vysor, but i cant for obvious reason. I have installed ADB universal drivers, LG drivers, Android Studio and am trying with adb commands like "adb devices" to make some connection with my tablet but it says that my devices is unauthorized and don't accept adb commands at all. I read over the INTERNET that i need to boot in TWRP mode and than I can use adb commands there without authorization. I have previously installed TWRP recovery and also debugging mode is enabled, but when i am supposedly in TWRP mode (I don't hear LG boot sound sometimes after Power + Vol down button combination) my tablet doesn't recognize at all from Windows 10 and "adb devices" command show "error: no device". Can you help me?
My tablet is with android Kit Kat, rooted, Debugging mode is enabled, TWRP is installed
In Windows Device Manager I see in Android Devices - LG ADB interface, also in Portable Devices - V700
Click to expand...
Click to collapse
Although I have personally not done so specifically for this purpose, you could try connecting a USB mouse via USB-OTG adapter and use the mouse pointer so select the check box and hit the correct button without using touchscreen... do provide feedback if you have success...

Related

[Q] Kindle 2nd gen issue

Hello all.
This is my first post and my first experience with android devices so please go gentle.
I recently purchased for £20 a kindle fire 2nd gen otter.
The reason it was so cheap was that it is stuck in a bootloop.
The friend I bought it from intended to bring it back to life and install CM to the device but never got round to it. So I took it on as my little project.
I have been scrolling through pages and pages of google and this site for research but have hit a brick wall.
I purchased a factory or fastboot cable knowing I may well need it. I also have the original cable.
When trying to boot the device I get the usual kindle and fire logo orange as of it's booting then every 10 seconds or so the screen will go black and back to the kindle fire bootloop.
I have tried to use the normal cable to link to my desktop on windows 7. When doing this the device will not show up in device manager at all.
When I plug it via a fastboot cable it boots into fastboot with a green flashing light on screen and is recognised as an otter prod 04 on device manager.
I have installed the latest sdk. Also fastboot.
I have changed the windows environment variables under path on the PC and can successfully run fastboot in a command window. I can also issue adb commands through also a dos command window so I know both are working correctly on my PC.
I have typed in fastboot devices
I have also typed in adb devices.
When I issue either or these commands my device will not be found through the command window. It just returns a blank.
I know this is due to drivers not working correctly so have opened device manager. Update driver , have tried the android sdk path for drivers have also tried my adb drivers. I have also downloaded the latest Google USB driver and none will install. I have a programme running that allows any unsigned driver to be installed on win 7 so I know it's not that.
All I have returned is cannot install drivers for otter prod. 04
The only thing it will accept is choosing from a list of devices, Then android. And installs as adb device or adb composite device, this is obviously useless as I can't boot device into normal mode to be able to use it as adb or issue commands to it.
I have tried everything. I know this kindle is save able I just don't know how. My end result is make it bootable, root device and install CM
I have trawled through loads of pages of info and tried tried and tried for answers but nothing works. Can anybody shed some light on the issue for me.
Many thanks in advance
Just thought id add, I have also tried all timed variations of holding down the power button
I have also let device run flat and recharge. Have also tried a different PC and USB port.
Hello Vincent,
ADB stands for Android Device Bridge (Just wanted to point that out since you are new to Android).
The ADB Composite Device driver lets your computer and your Kindle Fire device communicate with each other. This includes ADB as well as fastboot.
Install the ADB Composite Device driver in Device Manager and then go to the command line window and type fastboot -i 0x1949 devices and it should now show up in fastboot.
Now flash the stock bootloader, recovery, and system img files to your device. After that, you should see it boot successfully.
Hope this helped, and don't be afraid to ask me more questions about your device!
phiftyopz
Sent from my iPhone using Tapatalk

[Q] adb devices: unauthorized

Hi All,
I flashed TWRP to my sm-t320 with Odin in Windows. `adb devices' (in both Windows & Linux) can recognize my device but it always show unauthorized. Does anybody know how to fix that? but it's ok when I'm in twrp (turn off the tablet, then power+volume up to go to twrp: I didn't know this before, so this is for people like me), adb devices works fine.
dxxvi said:
Hi All,
I flashed TWRP to my sm-t320 with Odin in Windows. `adb devices' (in both Windows & Linux) can recognize my device but it always show unauthorized. Does anybody know how to fix that? but it's ok when I'm in twrp (turn off the tablet, then power+volume up to go to twrp: I didn't know this before, so this is for people like me), adb devices works fine.
Click to expand...
Click to collapse
Make sure you have USB Debugging enabled on your phone if you do turn it off connect your phone to your PC turn USB Debugging on and see if you get a message to allow your PC to connect to your Tab if you do then allow it.
Also check you have the correct drivers installed when connected to your PC
If you are on windows 7 right click my computer then properties and click Device Manager, look for Samsung Android Phones in the list and expand it, this should then say Samsung Android ADB Interface.
If you don’t see Samsung Android Phones your have the incorrect drivers assigned to you TAB, the one windows installs by default is generally the wrong one.
If you see Samsung Android Phones but when expanded it doesn't say Samsung Android ADB Interface then again the wrong driver is installed.
To correct it right click and select properties, then update driver, then click browse computer, then click let me select from a list Select Samsung Android ADB Interface.
When its installed you may get messages about devices not working properly just click OK to it, unplug you Tab then plug it back in again and wait for it to connect.
Open a CMD and type ADB Devices hit return and you device should be recognised,
If you are using TWRP then when you connect to your device in Recovery mode to your PC you need different drivers for that to work properly again the ones installed by windows as default are not the proper ones, it will work with the default ones but not correctly you probably will not be able to Push or Pull files or apk's.

Computer finding G4 through ADB

Has anyone gotten their computer find their G4 through cmd (adb devices). I cant get the adb message on my phone to allow access to my computer. I turned on and off usb debugging several times but i still don't see the message on my phone to allow access. I let me computer download the drivers when plugging up my G4 as well as allowing the install of PC drivers.
yes, working great for me. Do u have updated and right drivers? u find tread here with right drivers..
Sent from my unlocked and rooted LG-H815
I was having the same problem..
You need to install the LG Drivers and then your phone will connect via adb..you will be asked on your phone to allow the port connection after installing the proper LG drivers. Verify and you will be good to go..
I used these ones below in the attatchment or you can grab them from.....
http://www.theandroidsoul.com/download-lg-g4-driver-for-windows-and-mac-mtp-adb-download-mode-77723/
I think I found the issue. I had Note 3, 4, Nexus 6, S6 edge, and G4 all still on my computer in the device manager. I uninstalled all of them plus I uninstalled the adb driver in device manager. Plugged my G4 back in and ran the PC driver update via G4 and it worked. I can now see my G4. Don't know if I had to do all that to get it working but hey it worked for me.
I was having issues with this myself and didn't find a solution. I found out that I was having better luck switching it to Camera PTP from the notification dropdown. Sometimes I have to toggle to MTP back to PTP, The dev notifcation should appear when it is actually connected.
1. PTP
(1a. switch to MTP back to PTP if it doesn't work)
2. 'adb kill-server'
3. 'adb devices'
-If you see your device, you can try to 'adb connect **IP**' but it will most likely say it was unable to connect
4. give it your adb commands you want
It's the only way I've been able to get adb, hope this helps!
I was having this issue also. After install win10 then adb connection to my LG G4 (h818) was not detected. Back to android.com, it said that if general USB driver doesn't work then we must find OEM driver to the producer web. LG ADB Driver was about 17MB. After installed the driver then it was immediately detected. Thank God, finally.
I have silly problem. I bought used G4 LG from someone found in online forum. Checked all series on phone (sticker), on software "about phone" all showing LG H815 software version H81510H, but by adb ( linux machine ) showed H812xxxxxx .... set on developer option debugging the command "adb reboot bootloader" just send device into android boot ( device boot ). I wish to unlock the bootloader and put CM. Hard button option > pushing vol up + power button simultaneously did nothing, vol up + power button then > connect to PC via usb, did nothing ( just send phone to device boot ) ..... I have no windows machine

Why can't I get Windows to recognize a G4 in Fastboot mode?

I'm trying to unlock the bootloader on my daughter's G4, and I have run into a heavy snag. I get "code 10" (driver can not start) when it's in fastboot mode, but I'm fully able to connect with adb when the phone's up and running. This is not my first rodeo, and I'm sure the USB cable works (original cable), I have enabled USB Debugging (or ADB wouldn't work in the first place) and I think I have done everything else that should be done. But the damn thing won't work on any of my computers, under Windows 7 or 10. Driving me nuts! Also when it's booted up I see it as an LG Mobile ADB interface, but when it's on Fastboot it insists that it is an MTP device, even if I have set it as a PTP device when it's booted up. Can anybody please tell me what I have to do to get this to work? Another thing is that if I run "adb reboot-bootloader" (or even the wrong syntax (at least I think the dash should be there) "adb reboot bootloader", which LG's page says), it will not boot into fastboot/bootloader, it reboots into Android. So I have to get into the setup by holding in vol + and plugging in the USB cable. But I don't know if this is related.
Edit: Oh, btw, I have tried to find the latest drivers, so far I'm on 4.0.0.0. They are dated May 2015.

Unable to get xA2 in fastboot mode

Hi there,
strugggling to get the xa2 into fastboot mode so I can flash a new boot.img and root. I've enabled OEM unlocking and installed the USB drivers. the command 'adb reboot fastboot' doesn't work, just reboots the phone. adb over usb works fine. The official method to get into fastboot 'plug in USB whilst holding vol up/down' also doesnt allow me to get itno fastboot mode, phone just stays blank with a notification LED. I use 'fastboot devices' to see it if it connected. I've tried this on 2 PCs now to no avail
I'm thinking maybe the fastboot drivers are wrong?
Does anyone have any other suggestions or help?
Thanks
jaw2floor said:
Hi there,
strugggling to get the xa2 into fastboot mode so I can flash a new boot.img and root. I've enabled OEM unlocking and installed the USB drivers. the command 'adb reboot fastboot' doesn't work, just reboots the phone. adb over usb works fine. The official method to get into fastboot 'plug in USB whilst holding vol up/down' also doesnt allow me to get itno fastboot mode, phone just stays blank with a notification LED. I use 'fastboot devices' to see it if it connected. I've tried this on 2 PCs now to no avail
I'm thinking maybe the fastboot drivers are wrong?
Does anyone have any other suggestions or help?
Thanks
Click to expand...
Click to collapse
Hi
Install "5 seconds adb drivers"
Connect the turned off phone to PC via USB just pressing volume down button (no power) and keep pressing it until you see the LED turning green or blue.
Here u have! :highfive:
faby GT said:
Hi
Install "5 seconds adb drivers"
Connect the turned off phone to PC via USB just pressing volume down button (no power) and keep pressing it until you see the LED turning green or blue.
Here u have! :highfive:
Click to expand...
Click to collapse
Hi thanks for getting back to me,
I assume you meant the '15 second installer', which I just did just install successfully. I am still unable to see the device with 'fastboot devices' command.
Other info: I have factory reset the phone, made sure oem unlock is checked, tried the same process on another computer. I can get adb mode to work fine, but the command 'adb reboot fastboot' just reboots the phone as usual
jaw2floor said:
The official method to get into fastboot 'plug in USB whilst holding vol up/down' also doesnt allow me to get itno fastboot mode, phone just stays blank with a notification LED.
Click to expand...
Click to collapse
That is the correct behaviour.
Blue LED = Fastboot mode
Green LED = Flash mode (for reflashing stock firmware with XperiFirm in case EVERYTHING is broken)
Install these drivers:
https://adb.clockworkmod.com/
When in Fastboot mode, go to device manager, there is an Android device in there (may also be called MTP device).
In the device manager, install a new driver for that and use the ADB driver from C:\Program Files (x86)\ClockworkMod\Universal ADB Driver
Windows will tell you that it's the wrong driver. Install it anyway and Fastboot will recognize your XA2 now.
schmatzler said:
That is the correct behaviour.
Blue LED = Fastboot mode
Green LED = Flash mode (for reflashing stock firmware with XperiFirm in case EVERYTHING is broken)
Install these drivers:
https://adb.clockworkmod.com/
When in Fastboot mode, go to device manager, there is an Android device in there (may also be called MTP device).
In the device manager, install a new driver for that and use the ADB driver from C:\Program Files (x86)\ClockworkMod\Universal ADB Driver
Windows will tell you that it's the wrong driver. Install it anyway and Fastboot will recognize your XA2 now.
Click to expand...
Click to collapse
If it won't work, after that just go to devices and printers and delete Xperia XA2. It will work.
Else, after installing 15 seconds, inside device manager, update the driver of your phone (or mtp device), select local, then Android device, then fastboot. Disconnect the phone and reconnect as before (volume down)
Fastboot is VOL. UP (on this device)! (Not vol. down)
So basically turn off the device, hold Vol. UP and simply connect to USB, hold Vol. UP until LED is steady blue and you are set.
Note: VOLUME UP activates fastboot and VOLUME DOWN enables flashmode and/or recovery mode
Similar trouble here.
1. VOL UP + plug in USB: Blue led blinks once, then phone shows it's charging (turned off)
2. adb reboot bootloader: Phone just turns off
Corias said:
Similar trouble here.
1. VOL UP + plug in USB: Blue led blinks once, then phone shows it's charging (turned off)
2. adb reboot bootloader: Phone just turns off
Click to expand...
Click to collapse
I had the same issue with my XA2.
The solution (at least for me) was: different USB cable and different USB-port. As it turns out, my cable was somehow worn out (though data transfer and charging was working quite well). Going into fastboot, the blue led lit very short time and then the phone restarted. Furthermore on my PC it somehow only worked on the one USB port and not the other (both USB 3.0).
--> Maybe trying the most obvious might help also some of you
BoernMe said:
I had the same issue with my XA2.
The solution (at least for me) was: different USB cable and different USB-port. As it turns out, my cable was somehow worn out (though data transfer and charging was working quite well). Going into fastboot, the blue led lit very short time and then the phone restarted. Furthermore on my PC it somehow only worked on the one USB port and not the other (both USB 3.0).
--> Maybe trying the most obvious might help also some of you
Click to expand...
Click to collapse
Did solve this by connecting to different PC. No cable/port/hub change did help. Looks like there was some trouble with drivers (though the same PC fastboots Z3 Tablet Compact perfectly).
Same
I'm also having the same issue with my Xperia XA2 Ultra. (boy that's a mouthful)
Phone model is H3223.
Host OS is Windows 10 Pro v. 2004.
Using latest Android SDK tools (i.e. ADB and Fastboot platform tools): platform-tools_r30.0.5-windows. Got it directly from Android site.
I think I had a previous driver for Android already installed or somehow Windows got it. ADB worked, Fastboot didn't. Read online about someone on this forum getting it to work by using XZ2 driver from Sony as they evidently don't have a published driver for this device. The person who posted this solution had reported problems with this driver recently. I tried it anyway.... ADB commands work and my phone shows up when listing devices. Reboot into fastboot mode and the only thing my phone does is show a blue light indicator... no splash screen or logo. To me this means it's starting fastboot but my driver isn't working with it to recognize it as any commands for fastboot return nothing or fail. It doesn't show up under fastboot devices command.
Does anyone have a clue as to what to do?
that_random_guy said:
Same
I'm also having the same issue with my Xperia XA2 Ultra. (boy that's a mouthful)
Phone model is H3223.
Host OS is Windows 10 Pro v. 2004.
Using latest Android SDK tools (i.e. ADB and Fastboot platform tools): platform-tools_r30.0.5-windows. Got it directly from Android site.
I think I had a previous driver for Android already installed or somehow Windows got it. ADB worked, Fastboot didn't. Read online about someone on this forum getting it to work by using XZ2 driver from Sony as they evidently don't have a published driver for this device. The person who posted this solution had reported problems with this driver recently. I tried it anyway.... ADB commands work and my phone shows up when listing devices. Reboot into fastboot mode and the only thing my phone does is show a blue light indicator... no splash screen or logo. To me this means it's starting fastboot but my driver isn't working with it to recognize it as any commands for fastboot return nothing or fail. It doesn't show up under fastboot devices command.
Does anyone have a clue as to what to do?
Click to expand...
Click to collapse
I have the exact same problem, have not managed to find a solution trying with 3(!) different laptops and 2 different cables. No idea what could go wrong. I checked the device and it says that unlocking is okay. Really frustrating.
Edit: I actually found a way! Once you manage to enter the fastboot mode (light is permanently blue) go to the device manager in windows, click on the unknown android device, and install custom drivers (either by selecting from the list or by picking the universal adb driers from a local folder). These custom drivers should be adb drivers. Once they are installed, fastboot should work.
I had the same problems with my device XA2 H3113 and Win10.
My solution: Try it with Ubuntu. Just grab an 8GB usbstick, install Ubuntu via usb-installer, boot ubuntu and open a terminal
sudo apt update
sudo apt install adb fastboot
LolRoll said:
I have the exact same problem, have not managed to find a solution trying with 3(!) different laptops and 2 different cables. No idea what could go wrong. I checked the device and it says that unlocking is okay. Really frustrating.
Edit: I actually found a way! Once you manage to enter the fastboot mode (light is permanently blue) go to the device manager in windows, click on the unknown android device, and install custom drivers (either by selecting from the list or by picking the universal adb driers from a local folder). These custom drivers should be adb drivers. Once they are installed, fastboot should work.
Click to expand...
Click to collapse
Hey can you please provide me a link to the drivers? as I've been trying so many drivers and they don't work.
LolRoll said:
I have the exact same problem, have not managed to find a solution trying with 3(!) different laptops and 2 different cables. No idea what could go wrong. I checked the device and it says that unlocking is okay. Really frustrating.
Edit: I actually found a way! Once you manage to enter the fastboot mode (light is permanently blue) go to the device manager in windows, click on the unknown android device, and install custom drivers (either by selecting from the list or by picking the universal adb driers from a local folder). These custom drivers should be adb drivers. Once they are installed, fastboot should work.
Click to expand...
Click to collapse
works for me

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