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bobmcelroy15 wrote: ↑

Sun Nov 30, 2025 6:58 pm

I’m looking for help recovering my LG BP50NB40 (SVC NB52).
I was attempting the standard unlock → cross-flash process:

Step 1: BP50NB40-NB50 1.03-MK (Encrypted = ON) — SUCCESS

Step 2: BP60NB10 1.02-MK (Encrypted OFF, Write mode) — FAILED to apply

Recovery mode attempts → no LED, no spin-up, no response

I believe I’m now stuck in a corrupted bootloader state.

Symptoms:

LED does not turn on

No noise / no spin up

SDFtool now shows no options, no Recover popup

Device Manager shows the drive only under:

Other devices → BP50NB40
- No driver
- No firmware version
- No DVD/CD-ROM detection


What caused it:

I later learned NB52 drives require a “full bootloader flash” step between 1.03-MK → BP60.
I’ve seen people reference a file like:

BP50NB40 → NB52 boot-enabled recovery firmware
BP60NB10 1.00_HBD (MartyMcNuts, file id=2143)

But the old link (download/file.php?id=2143) is dead.

What I need:

Could someone please provide:

→ The NB52 boot-enabled recovery firmware (full flash / with bootloader)
→ OR the BP60NB10 1.00_HBD (full flash) file used for unbricking NB52 units

Once I have that file, I can use SDFtool’s rawflash or makemkvcon method to restore the boot block.