Bu40n 1.00 Firmware Page

If you are a casual user who wants to play a 4K disc on your PC using PowerDVD, this firmware will actually that functionality (PowerDVD requires bus encryption). This firmware is for ripping, not playback.

If you see 1.04 or higher, your drive is currently "locked." You cannot simply run the flasher on 1.04 —you will need to use the "recovery mode" or "bootloader" flashing method. bu40n 1.00 firmware

It seems you’re asking for a – likely referring to the LG BU40N (a slim internal/external Blu-ray drive, popular for UHD ripping with LibreDrive). If you are a casual user who wants

Once you have successfully flashed version 1.00 , you need to protect it. you need to protect it.