Moto g4 plus not booting up

[Adarsh balu]

Hey guys i had an invicta os rom . I wanted to go back to stock so i went back using a july 2016 stock firmware. It booted up and worked. Now i received nougat update. I downloaded and installed it. Due to some problem my phone is not booting. It is not even showing battery icon when charging. No response on cliking power and volume buttons for more than 120 seconds. When i connect the charger the indicator led flashes. That is all. What should i do????

 

[Adarsh balu]

Since no response on power and volume buttons i cannot go into bootloader and recovery also. Im suck on a black screen not change in color on charging. Only the led blinks when charger is connected... Pls help

 

[echo92]

By downgrading to stock Marshmallow from having stock Nougat, and then attempting to update via OTA, you've hard bricked. I warned about this in this post: https://forum.xda-developers.com/showpost.php?p=75033410&postcount=1166 Had you flashed the September 2017 stock ROM you would probably have been okay.

Effectively, by downgrading, you had a Marshmallow based system but a Nougat based bootloader (likely March/June/September 2017). By taking the OTA, you likely attempted to flash the December 2016 firmware update, including the bootloader, which corrupted your newer bootloader. Your device is showing the classic signs of being hard bricked from a corrupted bootloader, and I imagine if you connect your device to your computer, you'll see HS-USB 9008 or similar in Device Manager.

To rescue your device, you can try the blankflash and ROM here: https://forum.xda-developers.com/moto-g4-plus/how-to/moto-g4-plus-hardbrick-solved-guide-t3657761

In future, do not flash older stock ROMs to your device (e.g. Marshmallow or old Nougat firmware), or if you do, do not accept OTA updates. Else the same thing will happen and then the blankflashes may not work, leaving you with an expensive paperweight (or very expensive repair).