Firmware Hot — Bu40n 100
Introduction
The LG BU40N is a popular slim internal/external Blu-ray drive. Firmware version 1.04 (latest official) improves media compatibility and stability over earlier versions like 1.00.
Before You Start
Changelog (1.00 → 1.04)
Flashing Steps (Official)
Troubleshooting
If you're specifically looking for UHD ripping discussion, those guides belong on forums like MakeMKV or Doom9 where legal nuances (e.g., region, personal backups) are discussed with proper disclaimers.
The BU40N firmware version 1.00 is a highly sought-after "UHD friendly" firmware for the HL-DT-ST (LG) BD-RE BU40N optical drive. It is considered a gold standard for users looking to rip 4K Ultra HD Blu-ray discs because it lacks the read restrictions found in newer official firmware. Why Firmware 1.00 is Popular
Broad Compatibility: Unlike newer "MK" (LibreDrive) versions that primarily work with MakeMKV, version 1.00 is compatible with a wider range of software, including DVDFab.
Reliability: Some users report better stability with version 1.00 for tasks like burning 100GB BD-XL discs compared to version 1.04. bu40n 100 firmware hot
No Read Limits: It bypasses the UHD read limitations that LG introduced in later official updates. How to Get or Downgrade to 1.00
Most modern BU40N drives ship with newer, encrypted firmware (like 1.04 or 1.05). To use version 1.00, you typically must perform a "downgrade" using specialized tools: Anyone have the BU40N 1.00 Firmware? - www.makemkv.com
Scouring the MakeMKV and Reddit r/makemkv communities, the consensus is clear:
"Yes, the BU40N on 1.00 runs hot. Yes, it's annoying. But it's still the most reliable slim 4K ripper available. A $10 fan solves everything." Introduction The LG BU40N is a popular slim
The bu40n 100 firmware hot search is up 300% year-over-year because physical media collectors are returning to discs as streaming services delete content. If you want to archive your 4K collection, dealing with a warm drive is a small price to pay.
If you have landed on this page searching for the term "bu40n 100 firmware hot", you are likely experiencing one of two things: either your LG BU40N slim Blu-ray drive is physically running too hot after a firmware update, or you have heard that the 1.00 (or DE_1.00) firmware is the "holy grail" for 4K Ultra HD ripping.
You are not alone. In the world of optical media archiving and MakeMKV power users, the combination of the LG BU40N drive and firmware version 1.00 is currently a "hot" topic—literally and figuratively.
This comprehensive article will explain what the BU40N is, why firmware 1.00 is so sought after, how to safely flash it, and most importantly, how to solve the overheating issues that plague this drive when running "liberated" firmware. Changelog (1
It is highly likely there is a misunderstanding regarding the term "hot."
Firmware 1.00 does not have the power-saving restrictions found in later updates (1.01, 1.02, 1.03). The OEM firmware assumes the drive is inside a well-ventilated laptop. When used in an external USB enclosure, the laser diode runs at higher current, generating significant heat.
