Develop Bugs

[Q] Can't boot flashmode or flashboot mode

Phone with official rom , never isntalled CWM or any unofficial stuff. It boots ok to standard mode but not any other mode. I have tried in two different pcs with Windows XP and Windows 8. Phone doesn't even seem to try to boot in those modes, is not like the PC isn't detecting it.
I'm totally lost on how to recover the flashmode functionality to be able to unlck bootloader and install CM, any help will be welcome.

madmalkav said:
Phone with official rom , never isntalled CWM or any unofficial stuff. It boots ok to standard mode but not any other mode. I have tried in two different pcs with Windows XP and Windows 8. Phone doesn't even seem to try to boot in those modes, is not like the PC isn't detecting it.
I'm totally lost on how to recover the flashmode functionality to be able to unlck bootloader and install CM, any help will be welcome.
Click to expand...
Click to collapse
You must be doing something wrong.
Flashmode - turn the phone off, connect USB cable to PC, hold down Back button, connect USB cable to the phone. Green LED should light up, then phone is in flashmode.
Fastboot mode - turn the phone off, connect USB cable to PC, hold down Menu/Option button, connect USB cable to the phone. Blue LED should light up, then phone is in fastboot mode.

Nah, it didn't worked. I got it to still a recovery with X-parts app. Booted to the recovery, wiped everything, did a factory restore, since that moment it won't boot at all, Sony logo and it won't power off without taking off the battery. Of course, still won't enter flashmode or flashboot.

madmalkav said:
Nah, it didn't worked. I got it to still a recovery with X-parts app. Booted to the recovery, wiped everything, did a factory restore, since that moment it won't boot at all, Sony logo and it won't power off without taking off the battery. Of course, still won't enter flashmode or flashboot.
Click to expand...
Click to collapse
Did you install the drivers for it? If you want to use either flashtool or fastboot you need to install these programs along with the drivers. Also, ignore the prompt by Sony PC Companion when prompted. If you can boot into ROM, check that USB debugging is enabled.
僕のLT18iから送られてきた

popthosegaskets said:
Did you install the drivers for it? If you want to use either flashtool or fastboot you need to install these programs along with the drivers. Also, ignore the prompt by Sony PC Companion when prompted. If you can boot into ROM, check that USB debugging is enabled.
僕のLT18iから送られてきた
Click to expand...
Click to collapse
Drivers installed, USB debugging enabled, tried on two diferent computers.
I have some experience not only in flashing roms but also in rom cooking, kernel compilation, etc... and after all day I couldn't get it to go to flashmode. My girlfriend -she is the owner of the phone- remembered me we already have problems being unabled to access flasmode when she bought the phone and wanted to update it with sony software, so I finally took it to the shop so they can send it to repair service.
Thanks guys for your prompt replies.

Unable to enter download mode

So i discovered a strange thing from my G3 while trying to upgrade to 10E. My phone is unable to enter download mode to flash the update. I have done the procedure a in the flashing thread:
-turn off phone
-unplug USB
-hold down volume up
-plug USB
i can head windows play the device connected sound then proceed with the phone just displaying the normal charging display.
also, adb reboot download does not work, adb reboot recovery does.

PrimaryComplex said:
So i discovered a strange thing from my G3 while trying to upgrade to 10E. My phone is unable to enter download mode to flash the update. I have done the procedure a in the flashing thread:
-turn off phone
-unplug USB
-hold down volume up
-plug USB
i can head windows play the device connected sound then proceed with the phone just displaying the normal charging display.
also, adb reboot download does not work, adb reboot recovery does.
Click to expand...
Click to collapse
I had same issue, just make sure that you plug in the USB cable fast after you hold the volume up and also make sure you continue to hold the volume up.
Sent from my LG-D855 using Tapatalk

I tried a thousand times but every time it just start up mobile phone instead of going to Download Mode.

Remove the battery for a few seconds and be sure to plug into usb 2 and not into usb 3 port on your pc

I tried that too. Removed battery for seconds and connected to USB 2.0 but same issue. I wonder it connects to PC and LG Pc Suite without any problems. I'm sure all rivers are already installed but wonder why it can't enter download mode.
I lost LG original USB cable and use other cables ( I tried many ).
What's wrong then?!!! I even tried Windows XP and 8.1 but both same issue!

I'm having the same issue only I think it's because I really bricked my phone, not able to boot up or anything.

My gives me an error saying fast boot and a couple of commands with a black screen, Unable to get to download mode

[Q] Download Mode / USB Drivers not working

Hey there,
I press volume up + insert the USB, when the LG screen appears I let go of the volume button and leave it. After roughly 1 minute it says Download Mode however it only stays in this mode for roughly 20 seconds and then it goes into Fastboot mode saying "reset" and "changed port". I got the correct ROM for my IMEI and LGFlashTool however I think the main problem could be the LG USB drivers. When I try install the official drivers the installer says success however windows says not successful.
Image 1 - i.imgur.com/hPkZbLx.png
Image 2 - i.imgur.com/nxdYm39.png
I have tried uninstalling all LG drivers/software, restarting etc.
I am fairly sure I can flash if I can just figure out how to successfully install the drivers or connect the phone to the PC. Anybody have any ideas? I can use linux or try any suggestions/alternative software.
Kind regards,
Desperate G3 owner

Just an update that I was able to manually apply the LGE PORT/COM driver in device manager however the PC only recognises the device when it is in Fastboot Mode. When it starts in Download Mode as stated above, nothing happens, but after ~20 seconds it will automatically switch to Fastboot Mode and then the PC will detect the phone and says Fastboot Commands.
I have tried using adb.exe devices and fastboot.exe devices in cmd but nothing shows up, any ideas?

Bricked my LGG3

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.

A70 stuck in samsung logo and declines port.

I rooted my Galaxy a70 using vbmeta,Twrp and magisk. All was going well. Suddenly my phone turned off and when I press power button its shows download mode .so I tried odin to flash but every time it fails.After many tries I realise that its port are not connecting to pc ,its only charging and my pc also can't detect my phone ..now when I connect the phone to pc its shows samsung logo.its also not showing the battery percentage .
(My pc is ok it have all driver installed and odin works)
Is there anyway to solve.
Thanks.

reboot pc just to be sure.
connect phone and pc
on the phone in download mode screen, hold vol down and power till screen goes blank immediately let go and hold vol up and down to boot back into download mode. the letting go when screen goes blank to holding up and down needs to be fast.
now once back in download mode, is odin showing port number?
also make sure your using odin 3.13.3
if still no go, try uninstalling samsung usb drivers, reboot then reinstall and try the process again.

When I put cable in my phone it directly shows the logo....
Its not showing the battery

I tested my another Samsung phone to be sure that my softwares are working. And it's working but when I put my A70 in. Nothing happened