Downgrade of my BD-RE WH14NS40 MT1939 Possible?!?

Discussion of LibreDrive mode, compatible drives and firmwares
Post Reply
Knightynight
Posts: 3
Joined: Tue Feb 24, 2026 6:56 am

Downgrade of my BD-RE WH14NS40 MT1939 Possible?!?

Post by Knightynight »

Greetings folks! :D

I may have posted my inquiry in the wrong place. My hope is that I may be able to downgrade the firmware of my BD-RE WH14NS40 but it has the MT1939 Drive Platform. So that means that 4K/UHD may not be possible?

Not sure what the options are. Please advise?

Thanks!
KN

Drive Information
OS device name: H:
Manufacturer: HL-DT-ST
Product: BD-RE WH14NS40
Revision: 1.03
Serial number: K8AC4EN3855
Firmware date: 2114-03-26 11:05
Bus encryption flags: 17

LibreDrive Information
Status: Enabled
Drive platform: MT1939
Firmware type: Original (unpatched)
Firmware version: 1.03
DVD all regions: Yes
BD raw data read: Yes
BD raw metadata read: Partial
Unrestricted read speed: Yes
MartyMcNuts
Posts: 4722
Joined: Wed Nov 22, 2017 11:45 pm

Re: Downgrade of my BD-RE WH14NS40 MT1939 Possible?!?

Post by MartyMcNuts »

Knightynight wrote:
Tue Feb 24, 2026 7:19 am
Greetings folks! :D

I may have posted my inquiry in the wrong place. My hope is that I may be able to downgrade the firmware of my BD-RE WH14NS40 but it has the MT1939 Drive Platform. So that means that 4K/UHD may not be possible?

Not sure what the options are. Please advise?

Thanks!
KN

Drive Information
OS device name: H:
Manufacturer: HL-DT-ST
Product: BD-RE WH14NS40
Revision: 1.03
Serial number: K8AC4EN3855
Firmware date: 2114-03-26 11:05
Bus encryption flags: 17

LibreDrive Information
Status: Enabled
Drive platform: MT1939
Firmware type: Original (unpatched)
Firmware version: 1.03
DVD all regions: Yes
BD raw data read: Yes
BD raw metadata read: Partial
Unrestricted read speed: Yes
No. Your drive is too old (2014 model) and has the older, incompatible MT1939 drive platform. Do not try to flash it or it will become a brick. It already has libredrive enabled which is good for standard blu-ray and this is as good as this drive will ever get.
Cheers :D
----------------------------------------------------------------------------------------------------------------------------
For UHD enabled drives (AU/NZ/SG + Others) & DIY Single Drive Flasher (WW): https://uhdenableddrives.com
Knightynight
Posts: 3
Joined: Tue Feb 24, 2026 6:56 am

Re: Downgrade of my BD-RE WH14NS40 MT1939 Possible?!?

Post by Knightynight »

Hey, thanks for the quick reply MMNS :D ! Yeah, after a did a quick, in depth search, I discovered just what you stated. I also looked up the ship variants. Not worth the soldering efforts to swap them out. A can o worms fer sure :shock: ! Thanks again.
Post Reply