www.makemkv.com

I doubt it that this will help. Check on Cyberlinks's site the reason for the error code you receive when trying to play an UHD.

See also this thread. You must have a SGX system.
viewtopic.php?f=16&t=25516


The other possibility is running AnyDVD in the background but it only works with friendly drives like your WH14NS40. The BU40N is an official drive so that is not an option.

Don't flash this drive!!!! It is too old and not compatible with the newer firmware that need the MT1959 chip. Check with Makemkv. Most likely it is based on MT1939.

Insane conspiracy theory by both of you guys. I guess the BluRay laser is dead. That's it.

htkrs,

that's plain bullshit and a conspiracy theory. We want to stay with facts.

Clean that disc as good as possible. Wash with liquid soap and use a microfiber cloth afterwards. If ripping still doesn't work try DVDisaster instead of ddrescue.

If this is not a solution please check back here. Your USB adapter might need a firmware upgrade.

Try the ASUS modified flasher instead of SDFTool.

You posted in the DVD section instead of UHD.

Clean the discs with warm water and liquid soap and afterwards again with a microfiber cloth. UHDs show some invisible film that creates read errors - even if they look immaculate.

We have ro be more analytic when the next drive of this type comes again. Just to be clear how to handle flashing it in the guides.

If "enc" for encrypted was not required I just don't understand why you couldn't flash the other firmware. Makes no sense.

Was it required to use the "enc" option to flash this drive? This is an important piece of information.

They sell BH16NS40 old style on ebay. Don't buy those! If you want a full size drive buy a BH16NS55 or the ASUS equivalent.

No "enc" checked and it will work. Only LG firmwares are encrypted to this date.

De nada! Happy ripping!