Develop Bugs

[Q] help plz download mode doesnt work

sorry for my poor english first
the problem with my phone is I flashed OA-855minu5-1.8 rom with my d850 g3, then i want to back to stock by using lgflashtool( with tot file)
things goes wrong from here. 1st i see the flashing process failed , it told my phone is d855(im sure my phone is 850). then i used d855 tot file to flash (my fault ) it goes to about 80% tell me it will reboot my phone. but my phone stuck at the booting img(the text shows on screen "lg life's good, power by android")
after that i can not get into download mode but fastboot mode started. i tried to flash laf img(d850) doesnt work. but i tried with d855, it works
command that i used : fastboot boot laf.img
it still doesnt work with lg flash tool(two different tools) with both kdz and tot

kojolooo said:
sorry for my poor english first
the problem with my phone is I flashed OA-855minu5-1.8 rom with my d850 g3, then i want to back to stock by using lgflashtool( with tot file)
things goes wrong from here. 1st i see the flashing process failed , it told my phone is d855(im sure my phone is 850). then i used d855 tot file to flash (my fault ) it goes to about 80% tell me it will reboot my phone. but my phone stuck at the booting img(the text shows on screen "lg life's good, power by android")
after that i can not get into download mode but fastboot mode started. i tried to flash laf img(d850) doesnt work. but i tried with d855, it works
command that i used : fastboot boot laf.img
it still doesnt work with lg flash tool(two different tools) with both kdz and tot
Click to expand...
Click to collapse
So you have access to the download mode now ?
D855 is the international version and the D850 is the AT&T one. Does your phone has an AT&T logo ?
You can also check the variant on the box of your phone.

raptor2003 said:
So you have access to the download mode now ?
D855 is the international version and the D850 is the AT&T one. Does your phone has an AT&T logo ?
You can also check the variant on the box of your phone.
Click to expand...
Click to collapse
thanks anyway
i fixed it with F400K. dll and d850 tot file.

D8555 stuck at boot animation! Flash Tool says wrong model

I have a D855 LG G3 that is bricked!
Something went wrong on an upgrade to MM, and this is where I am at:
Phone is stuck in a boot loop - plays LG boot animation, then restarts
Download mode works
Factory reset works
All 3 flash methods do not work:
LG Flash Tool 2014
Comes up with "Upgrade stopped due to an error"
LG FlashTool V1.8.1.1023(LGD855_20140526_LGFLASHv160.dll + LGD855AT-00-V10e-EUR-XX-JUL-08-2014-32G+0.tot)
"Model Information Check FAIL!" Log shows that device has no model
LGUP
"You have to select a known model, please."
Please help, I will give many thanks and a donation!

Solved!
Device was a refurbished LS990, with D855 markings
After boarddiag, flashtools, and imei converting... I have a phone that works! (well, the data doesn't work)
If someone encounters the same problem, I will be happy to help fix your phone

LG G4 Error secure Boot 1003 with no Download Mode

Hi All,
I have a problem with My lg G4 H815T.
After an error upgrading with LG Bridge I got Boot loop with message 'Secure boot Error 1003' , I tried to flash an older ROM with LGUP but could not get into the download mode for the same reason 'Secure boot Error 1003'
Can any body tell me how can I fix this problem ?
Thanks in advance

inforo said:
Hi All,
I have a problem with My lg G4 H815T.
After an error upgrading with LG Bridge I got Boot loop with message 'Secure boot Error 1003' , I tried to flash an older ROM with LGUP but could not get into the download mode for the same reason 'Secure boot Error 1003'
Can any body tell me how can I fix this problem ?
Thanks in advance
Click to expand...
Click to collapse
Downgrading isn't a good idea btw. Upgrading is another thing but downgrading can give you results like this.
Are you able to go into the recovery mode? You could try a hardware reset from there.
.
Sent from my LG-H815 using XDA Labs

Thanks for replying.
Yes I can get into the standard LG recovery mode but when I choose to do a factory reset it shows me the same error message (Secure boot Error 1003) and reboot again.

My lg transpyre does the same thing. When you're in factory recovery does it say modified at top left corner? Mine does and when I select any option it just freezes on that screen saying secure boot error code1003 top left corner

Need Help Lg G4 Bricked......

Hello Everyone,
i need help reviving my lg g4 and i search all the forms but no avail. I just got a G4 4 days ago only it was running lollipop and working fine i just check for the MM update in phone but there was no update so as i previously own a lg g4 with flumics rom so i decided to flash a kdz with MM update. I see my model no. as h815 so i download H81520h_00_0516.kdz and flashed it through lg flash tool 2014 it flashed without no error but after the flash i got no display in phone just blue led flashes and i hear lg boot sound and then just nothing on phone display it switched off itself. I try to go into hard reset but again no display i try to go into download mode again no display. I attached it to pc it shows LGE Mobile USB Composite Device. Although it shows in lgup tool as H815 and port no. as well.I search my model no. through IMEI i found that it is actually F500L model as i see Korean as it flashed 1st time in download mode. After some research i manage to go into download mode by removing the battery and attaching the phone to pc as it shows empty battery icon so i inserted the battery by pressing the vol up button it goes into download mode. So i try to flash the right firmware which is F500L20u_00_0504.kdz bhut lgup says it invalid kdz i try to flash it through lg flashtool2014 but it says cannot connect to server and failed with contact system administrator. Although it flashes H815_EU_10C_00.kdz and India H818N10d_00.kdz firmware's but those give no display at all i tried it with Lg Bridge as it shows update avalable F500l and it download it but failed to flash it. I try flashing korean tot file LGF500LAT-00-V11d-LGU-KR-SEP-21-2015+0.tot through lgup tool but again it said invalid tot file So friends i am stuck and looking for 5 days to find any solution So anyone can please help me i just used it for 1 day . So can anyone help me.

You have to edit a F500L kdz with a hex editor and replace every F500L to H815 or something that flashes without error

First, if it's H815, you're to flash an H815 kdz with LG up
http://storagecow.eu/index.php?dir=Xda/LG+G4/H815/
Put into download mode and refurbish the kdz accordingly.

LG G4 H81010o AT&T "Secure booting Error 1006" and "bleu led"

Hello,
I got the LG G4 H810 (H81010o AT&T) and I tried to flash it whit a rom but somthing goes wrong.
Now when I boot my phone I got directly the message blew and even the LG Logo don't appear.
[700]--------------------------------------------------------
[750]
[800] Secure booting Error!
[850] Error Code : 1006
[900] OFFICIAL !!
[950]
[1000]--------------------------------------------------------
I manage to install TWRP but i can't install a rom or I don't know how.
Can someone please help me ?
Thank you very much,
imider

imider said:
Hello,
I got the LG G4 H810 (H81010o AT&T) and I tried to flash it whit a rom but somthing goes wrong.
Now when I boot my phone I got directly the message blew and even the LG Logo don't appear.
[700]--------------------------------------------------------
[750]
[800] Secure booting Error!
[850] Error Code : 1006
[900] OFFICIAL !!
[950]
[1000]--------------------------------------------------------
I manage to install TWRP but i can't install a rom or I don't know how.
Can someone please help me ?
Thank you very much,
imider
Click to expand...
Click to collapse
these devices have locked bootloaders. how did u install twrp?
best bet would to be to find what ever firmware device was on and reflash it with lg up or flash tool if u still have download mode.

Thanks for your reply.
I really don't know what i did to install twrp.
I try to use flash tool but doesn't detect my phone.

imider said:
Thanks for your reply.
I really don't know what i did to install twrp.
I try to use flash tool but doesn't detect my phone.
Click to expand...
Click to collapse
With flash tool goto device manager on pc.
click ports and com get into settings on it and change com port to 41
and have device in download mode powered off volume up + insert usb cord from pc

@imider I have the same problem trying to recover from a hardbrick on H815. Tell me what happens if you pull battery, plug bag, hold VOL DOWN and insert USB. Do you get fastboot?
EDIT: You might be able to flash it in FlashTool (I said no before) because I see you have Official Status not MODIFIED.

Thanks for your reply guys.
I manage to flash it with LGUP with a TOT that I downloaded.
Thanks.
:good::good::good::good::good::good:

imider said:
Thanks for your reply guys.
I manage to flash it with LGUP with a TOT that I downloaded.
Thanks.
:good::good::good::good::good::good:
Click to expand...
Click to collapse
Congrat @imider ,
maybe you can share what you did to fix your G4

Hello,
First I wanted to flash a clean rom on LG G4 H810 and I don't know what I did but the flash doesn't work and my phone has a black screen even the logo is not displayed.
When I connect my phone to my PC (windows 10) it's detected as "Qualcomm HS-USB QDLoader 9008".
Now this is the step that I follow to repair my phone :
1) I follow this tuto : https://forum.xda-developers.com/g4/help/lg-g4-bricked-qualcomm-hs-usb-qdloader-t3609999
2) After that I can enter download mode
3) I flashed a tot with LGUP
I hope it will help.

lg g4
Hi. I have lg g4 h81010o android 5.1. I put custom firmware and decided to fix build.prop. after that it at me didn't turn on. and I accidentally flashed it with another firmware.through qfil I restored the com port..but the LGUP program doesn't define my model..driver changed and LGUP version does not help. I think it's because I changed in build.prop..please help me find a solution