LG G3 D855 - Can't flash recovery, can't get into fastboot - G3 Q&A, Help & Troubleshooting

Hi. I have a problem with my LG G3 D855. Yesterday I messed up and soft-bricked my Marshmallow, but I figured it out and now I'm back on stock Marshmallow, but I lost my root and, appearently, custom recovery (I had TWRP).
The device boots normally, but when I use adb:
Code:
adb reboot bootloader
the device just restarts and loads into "normal" Android desktop. Sometimes it boots into safe mode.
When I try to boot into recovery using:
Code:
adb rebood recovery
the phone turns off and LED starts blinking red and blue, as if it was bricked. I can't access them using button combinations either.
I tried using LG One Click Root, but it ended with big fat #FAIL.
From what I understood, I'm going to have to re-flash the boot.img file, but where do I get one? And how do I flash it later?

as i said much times before use kingroot to root and then autorec MM d855 you can do this from phone and you dont need a pc

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Optimus G E975 won't start with red flashing led

Hi all, I managed to brick my Optimus G E975 (international version) - the inside of the phone shows E975K.
I have it running the stock ROM for over a year (rooted) and lately I am looking into flashing with custom ROM (KitKat). I have not even flash the phone, I just installed ROM Manager app (pro) and used it to boot to recovery. It won't boot to recover, so I use ROM Manager app to install TWRP (to replace clockmodwork). I booted to recovery and I got the fastboot but could not do anything so I rebooted to normal and install clockmodwork again. There was an option to Flash clockmodwork which I think I chose and I assumed that was installing clockmodwork. But when I booted to recovery, my phone never turned on anymore.
While I got my phone working, using ROM Manager I tried few times to make a back up of the current ROM but it was never succeeded. The phone just rebooted normally.
I opened my phone and disconnect the battery as some people suggested. But I still can't turn on the phone. I got flashing red led when I press the power button (with or without the vol up/down).
Please help. I hope I can unbrick my phone as the warranty is over.
Any info and help would be appreciated. Thank you.

[Help] Possibly Bricked LG G3 D855

My LG G3 is and international D855 and is unable to enter recovery, with the phone going black after the twrp logo shows for a few seconds. The phone has no OS installed because I was going to flash a custom rom so there are only bootloops when booting up the phone. Entering download mode is not any good either because a message appears saying secure boot error and the phone goes black with only the LED flashing Red and Blue, I tried going back to stock with fastboot but in the process I lost the ability to enter fastboot, is there any hope
I'm hoping somebody can help and I would be extremely greatful, Cheers
If you can't access Download mode or fastboot mode.you have to do this as in thread.
http://forum.xda-developers.com/sprint-lg-g3/general/guide-fix-hard-brick-recovery-guide-t3132359

Bricked and Undetected!!!

So I recently bought the Korean LG G3 (F400) and the first thing I did was rooting it, which was a breeze. Of course to root it I needed to install the LG Mobile Drivers, which I did and were working completely fine. Then I decided to take a little risk and attempt to flash CWM recovery (I did not know that I need to unlock the bootloader first or BUMP! the device) and well, flashed it the same way I flash stuff on my previous Samsung phones.
So now, when I try to boot the phone, I get the LG Logo and goes through with the boot animation, but after a little less than a second the boot animation fails and I get a black screen + the LED flashing blue and green and the phone remains like that. I tried factory reset but after I click yes it shows the LG logo then goes into a black screen (without the boot animation) + LED flashing blue and red.
So I tried finally going into download mode and attempting to return it to stock via LG Flash Tools, and like I said before the drivers were installed, but when I connect the phone to the PC it gives the message "Drivers were not successfully installed" and the LG Flash Tools fails to detect the phone. I checked within Device Manager and it says the LGE MTP device "cannot start".
So I'm pretty much stuck with a phone that doesn't boot, can't flash anything via adb or flash tools and no recovery installed. Can anyone suggest anything I can do to get this beast back up?
Try using this method http://forum.xda-developers.com/sprint-lg-g3/general/guide-fix-hard-brick-recovery-guide-t3132359

No recovery or download mode after TWRP flash

Hello
I have recently rooted my LG G3 D855 and all went fine until i flashed TWRP, which i most certainly did wrong, and now i have no way of restoring the device since entering recovery presents me with the 2 prompts and afterward a blank screen and flashing red and blue LED. I tried holding VOL+ and plugged in the usb but it does not send me to download mode. Overall the phone does work, i mean it boots up fine and has all it's functions except the 2 mentioned above. I currently an on Lollipop 5.0 V21a. If anyone could guide me on where to look, since the best i have found is restoring back to custom which is not an option, I would appreciate it ALOT.

TWRP not working - us990 Fulmics v6.9

I have Fulmics v6.9 installed on LG G3 us990 and wanted to install v7.6, but I can't get into TWRP. Holding down power + vol down method brings me to factory reset screen. I continue and get a endless flashing LG logo screen. I tried reflashing successfully with TWRP app, but nothing changes. I also tried rebooting into recovery with adb and TWRP app, but either TWRP doesn't start, LG logo flashes, or the screen stays black forever. I can't get into bootloader/fastboot mode with adb, so I can't flash an img. My phone still works fine with Fulmics v6.9, but I don't have TWRP. Thanks.

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