In these cases, you need (aka .ede or .hex + .mbn) to force a low-level bootloader restore via Thor2 or Windows Phone Internals .
If you've synced your Lumia 650 with a Microsoft account, you can try recovering emergency files from the Microsoft account: lumia 650 emergency files 2021
thor2 -mode uefiflash -ffufile RM1152_02177.00000.15213.43005_RETAIL_DEV.ffu -do_full_nvi_update -do_factory_reset In these cases, you need (aka
When the Lumia 650 launched, fixing a bricked phone was simple. You connected it to a PC, launched the Windows Device Recovery Tool, and it automatically downloaded the correct firmware. By 2021, that safety net is gone. By 2021, that safety net is gone
) that allow the phone to communicate with a computer when it is in a "black screen" or emergency download mode (EDL). Prerequisites and Required Tools : Install the Windows Device Recovery Tool (WDRT)
: A community member famously released the Lumia 650 emergency/manufacturing software payloads to help users stuck in download mode.