Airtel Xstream box not booting up-Failed Update

[jdavid]

My Airtel Xstream HD box (Model HY0001) is facing issues after a power interruption during an Android update, leading to three red lights on the device not booting up. Any way to restore it. Factory reset button didn't help.. anyway to reinstall the android OS

 

[Skeeter]

unlock bootloader, flash pixel experience on it using twrp recovery.