Request for LG BU40N CB05 Full Dump / Original Firmware

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senzox
Posts: 2
Joined: Thu Jul 30, 2026 3:18 pm

Request for LG BU40N CB05 Full Dump / Original Firmware

Post by senzox » Thu Jul 30, 2026 3:21 pm

Hello everyone,

I need help restoring my LG HL-DT-ST BD-RE BU40N back to its original factory firmware.

Drive information:

Model:

HL-DT-ST BD-RE BU40N

Original firmware:

CB05

Firmware date:

2117-11-29 13:51

Serial number:

N802HS000323

Current firmware:

1.03 MK firmware

I used SDFtool Flasher to make a backup before flashing, but unfortunately I only have a user dump:

dump_user_HL-DT-ST_BD-RE_BU40N_CB05_211711291351_N802HS000323.tar

The dump contains:

- fd_sn.bin

- fd_fwdate.bin

- inq.bin

- rom_003000.bin

- rom_1EC000.bin

- rom_1F0000.bin

However, it is not a complete firmware image and cannot be directly written back with SDFtool.

I am looking for:

- BU40N CB05 full dump

or

- Original CB05 firmware BIN

Preferably from a BU40N with the same firmware date:

2117-11-29 13:51

I would like to restore my original firmware while keeping my drive information.

Any help would be greatly appreciated.

Thank you!

Sayaka
Posts: 160
Joined: Sat Feb 28, 2026 3:00 pm

Re: Request for LG BU40N CB05 Full Dump / Original Firmware

Post by Sayaka » Thu Jul 30, 2026 4:40 pm

As incredibly unlikely as it may sound given this firmware version... I believe I have the original Hitachi-LG flasher for this particular firmware. Just please give me a short amount of time to see if I can extract the firmware from the flasher, and if not I'll just upload the flasher itself and pray for the best.

Sayaka
Posts: 160
Joined: Sat Feb 28, 2026 3:00 pm

Re: Request for LG BU40N CB05 Full Dump / Original Firmware

Post by Sayaka » Thu Jul 30, 2026 5:04 pm

Well, that was fast.

The original BU40N CB05 flasher (scanned with antivirus software, no threats found) : https://mega.nz/file/j2oVhC6C#J9m62OD9g ... GYg0RFVkp8

The same thing inside a zip file in case your browser does not want you to download an exe file : https://mega.nz/file/W7QUTYrA#O1kfVyabL ... jC9ULfSWl4

What you're actually looking for (the firmware itself, extracted from the flasher with SamuriHL's Firmware Extractor 2, with Downgrade Enable already set) : https://mega.nz/file/qi5BXSBL#UxwrS7hUt ... 8i-H--5280

Personally, I would recommend not bothering with the LG flasher and just flashing the firmware itself (no encryption, no bootloader, no recover, just a regular WRITE should do the trick).

This particular LG flasher was extremely difficult to find, I had to find an obscure download link on an obscure Japanese support webpage that was only accessible through a Japanese proxy.

And please remember... No refunds in case you brick your drive or something. As I like to say, the only way to be 100% sure that a flashing operation is safe is when the drive is still working afterwards. :wink:

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