LG Pad Verizon 10.1 VK700
My tablet was stuck in upgrading firmware mode whenever I booted it up. Used LG tool to flash stock firmware, and it would hang at 28%.
Went into recovery mode and clicked wipe cache, and when I rebooted it now says
boot certification verify and the top left with the LG logo and it hangs here.
Can no longer enter download mode to reflash.
Recovery mode still works, but none of the options work
*Wipe cache (top of screen will say boot certification verify and hang)
*Restore factory defaults (will hang at Restoring Factory Settings)
*Safe mode (reboots to boot certification verify and LG logo)
Figured I could try to use SRK tools, but nothing comes up in my Device manager when I plug it in anymore (not even qhsusb_bulk)
When I power it off and on with usb plugged in, windows will occasionally make the new device detected sound, but then make the device disconnected sound about a second later, so nothing will appear in device manager.
Does anybody have any suggestions or any way I can get this thing running again? Or anyway I can get my computer to even recongnize it as qhsusb_bulk so I can use SRK tools?
Related
Hello, first I'd like to thank you for your time reading this.
Note: I've searched the forums a lot, even for other LG Devices (G2 for ex) but I couldn't find a solution.
Trying to flash CM12 by _infected (amazing rom, working as a daily driver on my other lg pad btw) and messed up something on TWRP.
-First trying to do a Factory Reset via TWRP gave me "failed to mount /data" and "/system" I rebooted and the device went straight to TWRP Recovery, I rebooted again, this time making sure I selected "Reboot to System" and it went again to TWRP Recovery...
- I did another wipe, this time wiped everything (all checkboxes in TWRP), reboot and... no boot...
Now my LG Pad is at the following State:
- Black Screen (No LG Logo)
- Connecting USB to Windows gives the "connected sound"
- Adb doesnt find device (driver was installed and working).
- Device Manager "refreshes" on USB plug but doesnt show the device (or I can't find it?).
- Holding Power on the tablet while USB plugged to Windows gives the "disconnected sound" -> "connected sound" -> "connected sound".
- Can't boot into Download Mode.
- Can't turn off the Tablet... only Reboots holding Power key.
Please? Any help?
What can I do?
Is warranty void at this point?
Thank you very much for any help you can provide.
I have a G pad in the same situation, and I wasn't able to fix it. I managed to pick up another cheap one, but I'll follow this thread in case you get an answer.
You have to find a way to get it into download mode or you wont be able to fix it with LG Tool
What did you mess up, and how did you install twrp ? Also what twrp version abd base.
mekoneko said:
What did you mess up, and how did you install twrp ? Also what twrp version abd base.
Click to expand...
Click to collapse
For me personally, I assumed it'd be as easy as the twrp page makes it out to be , or my nexus 4 was, so I just went for it. I ran into that secure boot error with twrp, and rebooted back into stock. There was an OTA update, so I did it (stupid I now realise) and that bricked it on reboot. It won't turn on at all. If i plug into USB on a computer it OCCASIONALLY brings something up on the screen, the LG logo I think or something, but I cannot for the life of me get it into download mode. It's at home right now, so ic anot remmeber the exact thing it shows on screen, but almost certainly not download mode, and none of the hardware buttons seem to be responsive for doing factory resets or download or anything.
I managed to send the LG G Pad to warranty and got a new one... Lucky me...
Guess that if we can't get into DL mode they can't either.
However after much investigation I've realized that the problem was a corrupted system partition...
Stock ROM rooted. I think bootloader still locked.
Upon turning on lg-v500 there is a message in the corner
"Secure booting error
device unlocked so boot success"
and goes straight to TWRP
Cant restore backup - says successful but goes again to TWRP after reboot with same secure booting error message.
Tried this
Now, you have TWRP right?
Grab an external SD card and load a ROM onto it through the PC (for GPad)
Put SD in GPad, factory reset device.
Now go to install, external sd, locate ROM, Swipe to flash.
After flash wipe dalvik and cache then Boot to ROM.
No luck - result as above. boot to twrp and error message
Want to try this - but can not install usb drivers on 3 laptops, so no connection with lg pc suite
Download LG PC suite and install LG drivers to PC.
Plug LG GPad in PC
Run the LG Suite click Upgrade recovery.
Now it will download stock LG ROM and after download will flash automatically.
Will then reboot after flash.
Hopefully now is fixed.
If hangs at boot screen boot to stock recovery, (power off, power button + Volume down, when LG logo appears let go off all buttons, now press all three in. Will need two hands for it,)
Then get a factory reset prompt, click power button twice to perform a factory reset.
Any ideas, guides please?
That option helped
get the LG mobile support tool, power down the tablet completely (hold power for > 30 secs), hold the vol up and down buttons, and plug in the USB. This will put it in download mode then use the LG program to reset to stock
When using LG Flash Tool to flash a .tot file, everything went smooth till it boots MiniOS and Shows the blue screen "Factory Reset Status"
Now I can't seem to get beyond this level
I check that it's COM41, using the original cable, plugged to a USB 2.0 port, rebooted PC, etc, but it's stuck at "Waiting For connection when trying again".
Can anyone help me boot successfully?
When you're at the AAT mini OS screen, you need to hold down the power button and select Normal Boot.
Looked everywhere but couldn't find an answer to this problem.
My LS990 was on a MM ROM with TWRP recovery. I tried to install an app from another phone with Titanium Backup (Install App + Data) and it hung for a long time and then shut off. When I turned it on, it got to the startup animation and the froze. I removed and replaced the battery several times but always with the same result. Trying to boot into Recovery Mode got me to a blue screen, then it shut off.
I went into download mode and tried to flash LS990ZV4_04.51101 stock with LGFlashTool (which I have done before successfully). It only got to about 60% before stopping and shutting off. Now whenever I turn the phone on, after showing the LG logo it goes straight to the Firmware Update screen (without showing "download mode" first).
When I press Volume Down + Power it shows "Recovery Mode - loading..." for a couple of seconds and then shows Firmware Update.
On Device Manager the phone shows up as "LGE Mobile USB Serial port" (not AndroidNet)
When I tried flashing stock again with LG Flash Tool it gets to 38% and hangs forever. (done this several times)
I have pictures but XDA wont let me post outside links yet.
Is there anything I can do besides trying to short the pins?
I see that when I connect the phone to the PC without the battery inside it shows up as "Unknown Device".
Could I perhaps do something with that?
Hello everyone,
so here's my problem:
Wednesday morning i took my phone out of my pocket and had a blackscreen. I tried to restart it and took out the batterie but i always got stuck in the LG Logo or a bootloop. Since i had TWRP and lineage OS installed, i tried to go into the twrp menu with the factory mode (power button + volume down) but after the "double yes" i always got a blackscreen.
So i went into the internet to fix it myself. I tried the "LG Flash Tool 2014" with the kdz. reset & the other Flash tool with the tot. reset. Both didnt recognize my phone. At this point, the only thing that worked was the download mode BUT not the recovery mode that usually comes after it. It just showed the download mode for some seconds and then a black screen. Later i noticed that my phone showed as a "qualcomm device" in the device manager, and the internet said that this was bad. So i used "Board diag" and "Smart boot diag" to fix it, but at the point where the device should have restarted, and the download mode should have worked WITH the recovery mode, i always ONLY had the 6 second download mode. After messing a bit with "Board Diag" i even got it to show up as LGE AndroidNet USB Serial Port in the device manager, which apparently was even more bad and only way to go back to qualcomm was to shorten the pins which i did. And it worked BUT now i was back with the qualcomm stuff.
So as you can see, i've prety much run i circles since wednesday... Iam now at a point where 3 different thingscan happen when I try to put my LG into download mode (volume up + usb cable):
1. Its recognized as a unknown device which is constantly connecting and diconnecting, so iam assuming my phone is bootlooping with a black screen.
2. The download mode icon shows on my phone and disappears after some seconds but my pc fails to recognize it.
3. Nothing happens and the screen stays black
When i only connect the usb cable, it shows a stuck charging icon for some seconds and then goes black. Connecting without a battery shows the "missing battery icon". I tried with 2 pc's, both having the LG mobile driver 4.2 and the qualcomm driver installed AND beeing in testmode. Both don't recognize the device. I also tried 2 batteries on my phone but it changes nothing.
I have a D855. And i know that my situation is pretty f*cked but maybe someone i able to help me anyway. Thanks alot.