[wrxtasy]

When AML Android devices are pretty much bricked (not WeTek) you use the Amlogic USB Burning Tool and a Win. PC and whatever Android Firmware .img file that is compatible with your AML Android device like:

rom-vorke-z6-tanix-tx92-tvstock-nexus-rom-android-tv-7-1 (click)

Then there is this method using an OTA_update.zip file for whatever AML device you have:

Tutorial - how to recover / unbrick the U9 (click)