www.makemkv.com

Hello, I'm a newbie here. I'd like to watch or rip a UHD Blu-ray disc on my drive. I have LG BP55EB40 svc code: EB40, manufactured: november 2016. I tried to flash the firmware, but I got stuck.

Now i got makmkv and I can’t open the drive tray:
Drive Information
OS device name: O:
Manufacturer: HL-DT-ST
Product: BD-RE BP50NB40
Revision: 1.03
Serial number: MZ4GBTE1930
Firmware date: 2120-05-07 09:17
Bus encryption flags: 17
Highest AACS version: 72

LibreDrive Information
Status: Enabled
Drive platform: MT1959
Firmware type: Patched (microcode access re-enabled)
Firmware version: 1.03
DVD all regions: Yes
BD raw data read: Yes
BD raw metadata read: Yes
Unrestricted read speed: Yes

Is there any way I can recover/save the drive?

I got the identical drive with SVC Code EB52, manufactured November 2024.

Drive Information
OS device name: /dev/sr0
Manufacturer: HL-DT-ST
Product: BD-RE BP55EB40
Revision: 1.03
Serial number: [redacted]
Firmware date: 2120-05-07 09:24
Bus encryption flags: 17
Highest AACS version: 81

LibreDrive Information
Status: Enabled
Drive platform: MT1959
Firmware type: Patched (microcode access re-enabled)
Firmware version: 1.03
DVD all regions: Yes
BD raw data read: Yes
BD raw metadata read: Yes
Unrestricted read speed: Yes

Cross-flashed it with BP60NB10 MK 1.03 firmware.

Looking at both our drive infos, the product on yours is wrong, BD-RE BP50NB40 instead of BD-RE BP55EB40.

Did you perhaps follow the SDFtool Flasher Guide to the letter and got BP50NB40 firmware in the first step instead of BP55EB40 firmware?

I would try flashing with Write and Encrypted the MK BP55EB40-NB50-1.03 firmware to see if this corrects your issue

I managed to flash it to version BD-RE BP55EB40 1.03 as you described, but unfortunately the disc tray still doesn’t open when I press the “eject” button.

Drive Information
OS device name: O:
Manufacturer: HL-DT-ST
Product: BD-RE BP55EB40
Revision: 1.03
Serial number: MZ4GBTE1930
Firmware date: 2120-05-07 09:24
Bus encryption flags: 17
Highest AACS version: 72

LibreDrive Information
Status: Enabled
Drive platform: MT1959
Firmware type: Patched (microcode access re-enabled)
Firmware version: 1.03
DVD all regions: Yes
BD raw data read: Yes
BD raw metadata read: Yes
Unrestricted read speed: Yes

No disc inserted

Did the eject work before any flashing took place?

Can you eject it by using the small pinhole on the side of the button by carefully inserting a needle or small SIM removal tool?

Also, maybe your old drive does not play nice with the newer firmware.

Maybe looking into the Old folder within the MK firmware pack can yield an older version for your drive model that makes it play along.

Are you using both USB ends of the Y-cable at the same time? Not that it just does not receive enough power from the data connection alone

science-nerd wrote: ↑

Wed Feb 04, 2026 7:56 pm

Did the eject work before any flashing took place?

Can you eject it by using the small pinhole on the side of the button by carefully inserting a needle or small SIM removal tool?

Yes the eject work before any flashing
Yes I can eject using small pinhole

upgrade////
I managed to get back to clean firmware BP50NB40 1.00 and ejcect works but its not my original firmware
Drive Information
OS device name: O:
Manufacturer: HL-DT-ST
Product: BD-RE BP50NB40
Revision: 1.00
Serial number: MZ4GBTE1930
Firmware date: 2114-09-03 17:32
Bus encryption flags: 17
Highest AACS version: 72

LibreDrive Information
Status: Enabled
Drive platform: MT1959
Firmware type: Original (unpatched)
Firmware version: 1.00
DVD all regions: Yes
BD raw data read: Yes
BD raw metadata read: Yes
Unrestricted read speed: Yes

Very curious indeed. How about instead of going for BP55EB40 1.03-MK firmware you try to flash BP50NB40 from the firmware pack instead? Since this one seems to work "vanilla".

EDIT: just saw that with this firmware LibreDrive mode is enabled, soooo just put a disc in and try to decrypt it?

Should not matter too much between sister models which exact firmware is running, as long as you don't brick it. Since eject works and LibreDrive on paper is enabled, just go for a Rip

MFrost wrote: ↑

Wed Feb 04, 2026 11:39 pm

science-nerd wrote: ↑

Wed Feb 04, 2026 7:56 pm

Did the eject work before any flashing took place?

Can you eject it by using the small pinhole on the side of the button by carefully inserting a needle or small SIM removal tool?

Yes the eject work before any flashing
Yes I can eject using small pinhole

upgrade////
I managed to get back to clean firmware BP50NB40 1.00 and ejcect works but its not my original firmware
Drive Information
OS device name: O:
Manufacturer: HL-DT-ST
Product: BD-RE BP50NB40
Revision: 1.00
Serial number: MZ4GBTE1930
Firmware date: 2114-09-03 17:32
Bus encryption flags: 17
Highest AACS version: 72

LibreDrive Information
Status: Enabled
Drive platform: MT1959
Firmware type: Original (unpatched)
Firmware version: 1.00
DVD all regions: Yes
BD raw data read: Yes
BD raw metadata read: Yes
Unrestricted read speed: Yes

You have an SVC: EB40 which should never have been flashed. It is not UHD compatible. Please stop flashing it. It should at least work as it did before. There is very little difference (if any) between the BP55EB40 and the BP50NB40.

UHD discs were not visible either before flashing or after flashing. MakeMKV does not detect them in any case.

MFrost wrote: ↑

Thu Feb 05, 2026 7:36 pm

UHD discs were not visible either before flashing or after flashing. MakeMKV does not detect them in any case.

But do normal Blu-Rays and DVDs work?

The (newer like mine) drive would only accept UHD after cross-flash to unlock this capability, so that not working on vanilla firmware is be expected I suppose

science-nerd wrote: ↑

Thu Feb 05, 2026 7:55 pm

But do normal Blu-Rays and DVDs work?

yes

MFrost wrote: ↑

Fri Feb 06, 2026 11:07 pm

science-nerd wrote: ↑

Thu Feb 05, 2026 7:55 pm

But do normal Blu-Rays and DVDs work?

yes

Ok, now leave it alone. It is SVC EB40 and should not have been flashed in the first place. It is not UHD compatible.

Ok, Thank you for the information and for your support.

Which svc code is recommended for flashing, and what is the best manufacturing date of the drive?

MFrost wrote: ↑

Sat Feb 07, 2026 4:47 pm

Which svc code is recommended for flashing, and what is the best manufacturing date of the drive?

For flashing, a LG drive should meet all of the below:

Manufacture date 2016+
Drive platform MT1959
SVC: EB50, NB10, NB12, NB50, NB52, NS50, NS55, NS60 (not sure if there is an EB52 or not but if there is it shold be ok)

Basically, if a drive meets the first 2 but has SVC: EB40, NB40, NS40 forget about flashing it. It's not worth the risk, as you found out...