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Is my BD-RE WH14NS40 MT1939 Firmware Downgradable?

Posted: Tue Feb 24, 2026 7:08 am
by Knightynight
Newbie Alert! :D

Hello good folks!
This is my drive info and I would like to install the proper firmware for 4K/UHD. Is this possible with a drive platform of MT1939?
Thanks in advance!
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

Re: Is my BD-RE WH14NS40 MT1939 Firmware Downgradable?

Posted: Tue Feb 24, 2026 1:12 pm
by dcoke22
The MT1939 platform is too old to support 4K UHDs. If you try to flash it, you'll brick the drive.

It should work fine for ripping DVDs and regular blu-rays though.