In the manufacturing timeline, version 1.00 (sometimes labeled simply as "1.00" or "1.0") is typically the Release to Manufacturing (RTM) code. This is the software flashed onto the drive at the factory before it is shipped to retailers.
Key Characteristics of 1.00:
The BU40N 1.00 firmware introduces the following new features:
Solution: This is often a "sleeping brick." Unplug the drive from power and USB for a full 60 seconds. Plug it back in. If still dead, you may have attempted to flash 1.00 onto a drive with native 1.05+ firmware, which is not possible via standard methods. bu40n 1.00 firmware
In the world of physical media preservation, few pieces of hardware have achieved the legendary status of the LG BU40N slim internal Blu-ray drive. However, within enthusiast circles—specifically those involved in 4K UHD ripping, backup, and playback on PC—one specific version stands head and shoulders above the rest: BU40N 1.00 firmware.
If you own an LG BU40N drive (often found in external enclosures like the Buffalo BRUHD-PU3 or as an internal laptop drive), the firmware version installed on your drive is the single most important factor determining what you can do with it. This article will explain everything you need to know about BU40N 1.00 firmware: what it is, why it is coveted, how to check your version, and the risks and rewards of obtaining it.
While 1.00 is desirable, there are caveats: In the manufacturing timeline, version 1
Do not try to flash 1.00 on a drive that has newer firmware without following a specific downgrade procedure.
Here is the crucial catch: LG has blocked downgrading.
If your BU40N currently has firmware 1.03, 1.14, or any version higher than 1.00, you cannot simply run LG’s official updater to go back. The drive’s bootloader (flash memory controller) rejects any firmware older than the current version. Plug it back in
Furthermore, newer drives manufactured after 2021 may ship with "SVC Code NS60" or encrypted firmware that is currently impossible to downgrade using standard methods.
The primary reason is UHD (Ultra HD Blu-ray) ripping / LibreDrive compatibility.