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The manufacture date on the drive is April 13, 2022. This drive was just purchased a couple of weeks ago. On the enclosure it says Model: BP50NB40 SVC Code: NB52
It is a usb drive and I'm using both the usb data and extra power connection. Voltage Rating is 5V (1.8A). The Rom Ver listed on the drive ...

Found this in the thread SDFTool flasher:

UPDATE - 21/12/2021:
The latest version of the SDFtool Flasher has a checkbox option to flash the boot loader with the main firmware to the drive. This is useful for the newer BP50NB40 with SVC: NB52. It's also possible that other newer models may ...

I've tried this one first using the new SDFtool Flasher 1.37 and using the old SDFtool Flasher
BP50NB40 to > BP50NB40-NB50-1.03MK then to > BP60NB10 1.02MK

Then I tried both ways
NB52 to > BP50NB40-NB50-1.03MK with enc > BP50NB40-NB50-1.03MK with bootloader/full flash > BP60NB10 1.00_HBD

Each ...

I've tried this one first using the new SDFtool Flasher 1.37 and using the old SDFtool Flasher
BP50NB40 to > BP50NB40-NB50-1.03MK then to > BP60NB10 1.02MK

Then I tried both ways
NB52 to > BP50NB40-NB50-1.03MK with enc > BP50NB40-NB50-1.03MK with bootloader/full flash > BP60NB10 1.00_HBD

Each time ...

I've followed the instructions and haven't be able to change the firmware on my LG BP50NB40 NB52 Blu-ray writer.
Below is the device info if that helps. Thanks in advance for any help
Drive Information
OS device name: D:
Manufacturer: HL-DT-ST
Product: BD-RE BP50NB40
Revision: 1.03
Serial number ...