BU40N - Drive detected, firmware readable, flashing succeeds, but eject no longer works

[isaactr13]

Hello,

I have an external HL-DT-ST BD-RE BU40N (MT1959 platform).

Several years ago I attempted to flash it using SDFtool following a guide. Unfortunately, after the flash completed, the drive never ejected again.

Current status:

- Windows detects the drive correctly.
- MakeMKV detects it correctly.
- Model: HL-DT-ST BD-RE BU40N
- Firmware reports as 1.00
- LibreDrive information is displayed normally.
- SDFtool detects the drive without problems.
- I successfully performed a READ firmware dump (2 MB).
- I successfully flashed DE_LG_BU40N_1.03_MK.bin using SDFtool v1.3.5.
- Flash finished with "Done Successfully".

However:

- The tray still does not eject using either the hardware eject button or MakeMKV.
- Windows Explorer never shows a disc drive.
- The tray can only be opened with the emergency pin hole.
- No disc is inside.
- The drive is inside an ODP95-SU3 USB enclosure.

Could this indicate corrupted NVRAM / calibration data rather than the main firmware?

Would RECOVER mode be the recommended next step, or is there another recovery procedure for this condition?

I can provide:
- Full firmware dump
- SDFtool screenshots
- MakeMKV screenshots

Thank you.

[Billycar11]

i would assume it the case
post the makemkv drive info section in plain text
and try it out of the case with one of the adapters from the guide

[isaactr13]

Thank you.

I will post the complete MakeMKV drive information in plain text.

Regarding the enclosure, it is currently installed in an ODP95-SU3 USB enclosure. I will try the drive with one of the recommended adapters from the UHD guide and report back.


Drive Information
OS device name: F:
Manufacturer: HL-DT-ST
Product: BD-RE BU40N
Revision: 1.00
Serial number: MDEFASI0453
Firmware date: 2116-12-20 15:28
Bus encryption flags: 17
Highest AACS version: 66

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


Since the issue started immediately after a firmware flash years ago, do you still think this is more likely to be the USB enclosure rather than corrupted firmware/NVRAM?

[Billycar11]

Thank you.

I will post the complete MakeMKV drive information in plain text.

Regarding the enclosure, it is currently installed in an ODP95-SU3 USB enclosure. I will try the drive with one of the recommended adapters from the UHD guide and report back.


Drive Information
OS device name: F:
Manufacturer: HL-DT-ST
Product: BD-RE BU40N
Revision: 1.00
Serial number: MDEFASI0453
Firmware date: 2116-12-20 15:28
Bus encryption flags: 17
Highest AACS version: 66

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


Since the issue started immediately after a firmware flash years ago, do you still think this is more likely to be the USB enclosure rather than corrupted firmware/NVRAM?

i was expecting it to be in boot mode seen that with cheap adapters
email me your dump file see below for email how did you do a full backup with dosflash?
if so also dump your current fw and i will look at them