It is highly likely there is a misunderstanding regarding the term "hot."
Ensure your discs are clean; the 1.00 firmware is highly sensitive to minor smudges.
Check your drive's information in the MakeMKV interface. If your revision is U100 or higher, standard official firmware updates may have "downgrade checks" that block easy flashing The Hardware: The
is a slim drive. If it is in an external enclosure, ensure the enclosure has ventilation holes. If the drive is internal, ensure your PC chassis has sufficient airflow. bu40n 100 firmware hot
Stable for some, but often slower and prone to overheating during prolonged 4K ripping.
The LG BU40N 1.00 firmware is highly sought after by UHD enthusiasts because it is "UHD-friendly," allowing tools like MakeMKV to enable LibreDrive mode and bypass AACS2.0 protection for 4K Blu-ray ripping. This unpatched factory version facilitates reading raw data from discs, which is restricted in newer, "encrypted" firmware versions found on updated drives.
Open MakeMKV and check the "Drive Information" tab. It should list the product as HL-DT-ST BD-RE BU40N . It is highly likely there is a misunderstanding
If you have a BU40N with 1.00 firmware, do not use official LG update tools. They will "lock" your drive, making it significantly harder (though not impossible) to revert to a UHD-friendly state. How to Check Your Firmware Version
Once you have successfully flashed your BU40N to the "hot" 1.00 firmware, here is what you can expect:
Most users searching for BU40N firmware are looking to to enable UHD Blu-ray playback. If it is in an external enclosure, ensure
Users report that 4K discs fail to load, causing the drive to retry multiple times before ejecting the disc.
The is a slim, slot-loading 9.5mm Blu-ray drive. It is a favorite among the "UHD Friendly" community because, with the right firmware, it can rip 4K Ultra HD Blu-rays using software like MakeMKV.
Generally considered the most stable version for 4K UHD ripping.
I can provide specific command-line strings or tool recommendations based on your setup. Share public link
This is why the search query exists: people are desperate to downgrade to 1.00 or find a drive that still has it.
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