Since official support for Windows Phone has ended, the community is your best resource. Forums dedicated to Windows Phone enthusiasts are invaluable:
Install the Windows Device Recovery Tool to deploy the correct drivers to your operating system.
If the button reset doesn't work, you likely need to flash the original firmware. lumia 650 emergency files fix
The Ultimate Guide to the Lumia 650 Emergency Files Fix: Revive Your Bricked Windows Phone
Note: Official WDRT supports many Lumia devices. This is the most reliable recovery method. Since official support for Windows Phone has ended,
To attempt a fix, you must manually source and apply these components:
The Lumia 650 does not have the same community support as the Lumia 950 or 1020. However, the is your last line of defense. By manually pushing the Hex loader and bootloader via Thor2, you can bypass corrupted UEFI and restore Windows 10 Mobile from the ashes. The Ultimate Guide to the Lumia 650 Emergency
Once the emergency files are loaded, you can flash the standard firmware .ffu file to restore the phone. Method 3: Using Thor2 Command Line
Installed primarily for the necessary Qualcomm and Lumia drivers.
Before attempting the repair, you must gather the necessary software and drivers on a Windows PC.