Phone dead (hard bricked) led blinks randomly when plugged in.

I was using the phone normally, after i pressed lock key and tried to unlock after a while, phone is completely dead. Initially, the device was shown as a qloader device, so i flashed stock ROM through edl ( test point), the flash was success but the phone didn't turn on. The led flashing pattern is different from edl flashing pattern, sometimes it blinks twice, sometimes four times and sometimes, it doesn't blink.

i also tried to disconnect the battery cable, plug in charger and connect the charger back. This also didn't help. I also tried to unplug when the led wasn't blinking and plug back in as to make led blink for longer, this also didn't help.

battery wasn't empty when this happened. i also tried with different charger and leave it plugged in overnight.

ps: the device is xiaomi mi a2 lite (android one variant), i couldn't find that specific one, so it i set it to mi a2.