Devices killed by bad flashes or failed updates could be revived at home without expensive hardware boxes (like ATF or JTAG RIFF boxes).
Below is an exhaustive, technical guide to accessing these exclusive files and deploying them to revive a bricked Lumia 650. What Are Lumia 650 Emergency Files? lumia 650 emergency files exclusive
Open WPInternals with administrator privileges. If it detects your phone automatically, great. If not, click the button. Devices killed by bad flashes or failed updates