[Android Head-Units] moltenauta:
Hi, i have touched my Hyundai Accent 2018 GL mid radio ... manufactured by LG for Hyundai.

After hours of looking a way to revive it, found instructions to go to engineering mode from screensaver menú, by touching from left hand, center and right hand seven times.... entered to engineering mode, after that clicked on reboot to install upgrade and never figured out it turns into a boot loop, showing "System update" screen in spanish... update in course, if you turn off the system or retire USB, you can loose data. wait until update is complete... and after three screens like this... reboot and goes to same screen, after many hours looking for the update... got there is no update available to download... and turned into a nightmare... after 5 hours of internet... got the idea about get it out of the car, got it done... and the model it's LAM1770NMHC , looked for the firmware and OS Stock on LG Opensource page... and downloaded a .ZIP of 1.6 GB in size... placed it on a USB and connected that to the car...and won't update... then opened a readme file... and says this text.

How to build

1. Android build

(1) Set up build server

- Same to Android Jelly Bean build environment

* 32bit Linux PC(Ubuntu OS recommended)

* Java Version 1.6.0

* Python 2.6.0

* git Client

Cf) source.android.com/source/download.html

(2) Untar opensource And kernel

- Untar opensource packages of LNM1880NNBD_JB_v1_Android.gz into your working directory

- Untar kernel source of LNM1880NNBD_JB_v1_Kernel.tar.gz in to opensource packages directory

- change LNM1880NNBD_JB_v1_Kernel folder name to 'kernel'

a) mv LNM1880NNBD_JB_v1_Kernel kernel

* Caution! kernel source must be in the opensource packages directory, as a result, it should be following tree

abi bionic bootable build .... kernel ...

(3) setup the build environment to your shell

- Run the following command and scripts to setup environment

a) source build/envsetup.sh

b) lunch 1

c) source LGE_env.sh

(4) Kernel Build

- Enter directory to kernel root

cd kernel

- make configuration:

make tcc893x_koecn_5th_pio_defconfig

- make -j8

(5) run build script

- Run the following command and scripts to build all sources

a) ./build.sh

* The following modules are specifically installed in a specific path, with a different name

mkntfs.tuxera <- device/telechips/tcc893x-common/tuxera/ntfs/tools/src/ntfs-3g

I really have no idea about this.... and i need help ....Anyone can help me out about how to do it? ... or get out of that bootloop ?

tried to join into "recovery mode" to return to stock room...cleaning cache and rebooting but never found how to do it... tried lot of other ways for different car AV systems... but with no luck.... anyone can help me in this please? :crying:

I have upgraded rom of phones by recovery mode, but never car a/v systems ... and don't know hot to join in this LG radio.

I have photo of radio ,and screens i see, same for firmware/OS versions taked few days ago but can't paste images here.

about the file downloaded ZIP file

LNM1981NMLX.zip and inside it's a folder called LNM1880NNBD_JB_v1_OpenSource this has two folders

LNM1880NNBD_JB_v1_Android

LNM1880NNBD_JB_v1_Kernel

and the README.txt content pasted before

Regards

Luis