Bu40n 1.00 Firmware [FREE]
Most BU40Ns can be flashed directly. Connect the drive. Ensure no disc is inside.
This article is for educational purposes and digital backup of legally owned media only. Circumventing DRM may violate laws in your jurisdiction. bu40n 1.00 firmware
Firmware version 1.00 for the BU40N is the release. Later updates (1.01, 1.02, 1.03, and 1.14) were pushed by LG specifically to patch these vulnerabilities. Here is what version 1.00 offers that newer firmware does not: 1. Full LibreDrive Support LibreDrive is a feature integrated into MakeMKV. When a drive has "LibreDrive enabled," the software takes direct control of the drive’s firmware, bypassing the host's operating system limitations. With firmware 1.00, the BU40N achieves "LibreDrive Friendly" status, allowing it to read the raw encrypted data from any 4K disc regardless of region or AACS version. 2. No "Sleep Bug" Newer firmware versions suffer from an infamous "sleep bug." If the drive sits idle for 20 seconds while reading a UHD disc, it enters a low-power state. To wake it up, MakeMKV must send a reset command, often causing the rip to freeze or fail. BU40N 1.00 firmware does not have this sleep bug. 3. Direct UHD Reading without "Friendly" Drive workarounds Unlike desktop drives (e.g., ASUS BW-16D1HT) that require specific "friendly" firmware versions (like 3.02 or 3.10), the BU40N on 1.00 works seamlessly with any UHD disc up to BD-100 (triple layer). 4. Speed Unlocking Users consistently report that the BU40N on 1.00 rips faster than its rated specification. While the drive is rated for 4x BD-ROM reading, users often sustain 6x to 8x read speeds on UHD discs because 1.00 lacks the artificial speed throttling present in later revisions. The Risks: Why You Cannot Just "Update" to 1.00 Here is the crucial catch: LG has blocked downgrading. Most BU40Ns can be flashed directly
If you own an LG BU40N slim internal Blu-ray drive, you have likely stumbled upon warnings not to update your firmware. You may have seen cryptic references to "SVC code NS50" or "flashing to 1.00." This article is the definitive resource for understanding what this firmware version is, why it is the "Holy Grail" for ripping 4K UHD discs, and exactly how to use it safely. Before diving into the specifics of version 1.00, let's establish the hardware. The LG BU40N is a slim, 9.5mm slot-loading or tray-loading Blu-ray writer. It is commonly found in high-end laptops (such as older Alienware or Dell XPS models), external USB enclosures (like the Buffalo BRXL-PU3), and custom home theater PCs (HTPCs). This article is for educational purposes and digital
