Fast boot mode started, can't go to download mode

norbertix · Oct 25, 2014

Hi Everyone
Sorry for my not so good English.

I have problem with my G3 and maybe someone can help? I instal root without problem, than I try to install Twrp recovery and after that I have that message ( [780] fast boot mode started) all the time, I try to do hard reset, click yes twice, but getting the same message, Is there any chance to unbrick that device when I can't go even to download mode?
Thank You very much for any suggestions

paulitorj · Oct 29, 2014

help!

help my G3 died the same thing happened!

nerija.nest · Nov 22, 2014

same to me...

Swizzle82 · Nov 22, 2014

What model(s)? Youll need a pc, adb/fastboot, stock laf.img and boot.img for your device. Youll use adb commands to erase these img files and restore them with the new ones. Once you have adb running and recognizing your device with both files in same folder as adb you'll type adb erase laf [Enter] then adb flash laf laf.img [Enter] do the same steps for the boot.img. Next type adb reboot [Enter] you'll still be in fastboot but just pull the battery. Then replace battery and you should be able to enter download mode by inserting the usb and pressing vol +(i believe, it's been a while) and then kdz flash..

nerija.nest · Nov 22, 2014

lg g3. maybe you have link ? how to do this..
Thanks.

Swizzle82 · Nov 22, 2014

nerija.nest said:
lg g3. maybe you have link ? how to do this..
Thanks.

I know its an lg g3 but what model. I dont have a link to these files and don't feel like searching youll have to search the forum.. Also I just told you how to do this..

nerija.nest · Nov 22, 2014

D855 16gb , This is what needs to be missed for several days in search of forum. Will be a beautiful day..

Swizzle82 · Nov 22, 2014

nerija.nest said:
D855 16gb , This is what needs to be missed for several days in search of forum. Will be a beautiful day..

Ok well I'll meet you in the middle. Heres the link to the d855 partion files http://xdaforums.com/showthread.php?t=2766437. I believe you'll need the second link in the ops first post. As far as adb.. If you dont know how to use it or get the files, Google should be able to help you.

xmagiicsx · Nov 23, 2014

Swizzle82 said:
Ok well Ill meet you in the middle. Heres the link to the d855 partion files http://xdaforums.com/showthread.php?t=2766437. I believe youll need the second link in the ops first post. As far as adb.. If you dont know how to use it or get the files, Google should
be able to help you.

Did he drag the .img to the command prompt in order for it work. So its flash laf (the file that is dragged) next do the same thing with boot.img ( flash boot (drag boot file)) and the recovery.img

---------- Post added at 07:47 PM ---------- Previous post was at 07:46 PM ----------

Its suppose to boot up the phone with no problem

nerija.nest · Nov 23, 2014

i have one problem, not can write files FAILED (remote: flash write failure fastboot unlock , bet I not can write and erase... failure...

mehmetbulkac · Dec 4, 2014

download mode problem

I couldn't fix this problem.
[520] Fastboot mode started
[610]--reset--
[610]--portchange--
[730] fastboot: processing commads
can't go to download.I tried adb erase laf adb erase boot I guess I couldn't do.help

tungkick · Dec 4, 2014

if not done contact fb tungkick777 i can help all every body free

mehmetbulkac · Dec 4, 2014

fastboot mode started

plz

tungkick said:
if not done contact fb tungkick777 i can help all every body free

NEXUSg4 · Dec 12, 2014

I have the same problem.. i have d852.. please help!!

the incredible · Dec 12, 2014

i have the same problems after the new upgrade to lollipo 20E vodafone Italy..

Fusquinha77 · Dec 15, 2014

Same here

Edit: Solved

1) Took battery and USB Cable off
2) Pressed Volume Up
3) Took battery back while pressing volume up
4) Inserted USB Cable while pressing volume up
5) Phone started Download Mode
6) installed kdz through LG Flash Tools

Right now typing from my LG G3

Molgorth · Dec 18, 2014

Great!!!

Thank you very mucho Fusquinha77!!!

skeylight · Dec 19, 2014

I cant get it, I use every way(erase boot,system,recovery, use advence power menu ext..)
But i cant go to download mode

Sent from my Smartfren Andromax AD6B1H using XDA Free mobile app

SaharLevi · Jan 6, 2015

Fusquinha77 said:
Same here

Edit: Solved

1) Took battery and USB Cable off
2) Pressed Volume Up
3) Took battery back while pressing volume up
4) Inserted USB Cable while pressing volume up
5) Phone started Download Mode
6) installed kdz through LG Flash Tools

Right now typing from my LG G3

I can see a different screen for a split of a second but it's going back to Fastboot mode...

jcfunk · Jan 14, 2015

@SaharLevi
Here's the fix Quick and easy
need to have fastboot, I used ubuntu can install with sudo apt-get install android-tools-fastboot
info on fastboot
[TOOL] [WINDOWS] ADB, Fastboot and Drivers - 15 seconds ADB Installer
also need recovery.img, I used the lastest twrp

In terminal
fastboot boot recovery.img

this will boot your phone with the img on your computer.

in recovery restore or install a good boot or kernel.
your phone should be good to go after that.
I had my phone fixed in about 5 min, I really should not play around with boot partition.

Also should be able to flash boot if you have a good one,
fastboot flash boot boot.img

Fast boot mode started, can't go to download mode

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