The exact currently shown in Windows Device Manager The precise terminal error message if a flash fails

The official Windows Device Recovery Tool (WDRT) errors out, displaying: "Emergency files for this phone are not available." What Are Emergency Files?

For a more user-friendly interface, can often automate the process of downloading these files and switching the device into the correct "Flash mode". Users can use the "Manual mode" section of the tool to select their downloaded FFU and emergency files to attempt a bootloader unlock or recovery. Critical Precautions Lumia 650 DS Emergency state | Windows Central Forum

The screen is completely red, and the phone is unresponsive.

thor2 -mode emergency -hexfile [path to .ede file] -edfile [path to .edp file] Complete the flash:

: These define the partition layouts and instructions needed to prep the phone’s eMMC storage to accept new firmware.

Download and install it on your PC to ensure the necessary drivers (like "Care Suite Emergency Connectivity") are installed. WPInternals:

: A primary third-party repository where you can search by your phone's Product Code (found under the battery) to find matching .ede , .edp , and .ffu files.

Wait for the device to be recognized in QDLoader mode (usually Port 9008).

"Interesting moment that there are no emergency files only for Lumia 650/DS... There is no way to extract this (.EDE, .EDP) files from working phones and recover... until MS upload this emergency files on it's servers."

: You can download comprehensive Lumia emergency archives directly from the Proto Beta Test Lumia Emergency Files Hub .