The LG BU40N 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.
Firmware 1.00 is the original launch firmware for this drive. It is highly sought after because it is fully "LibreDrive compatible" out of the box, requiring no additional patching. However, users frequently report that after flashing to 1.00, the drive becomes excessively hot, even during idle or light reading tasks.
User quote from forum archives: "I flashed my BU40N to 1.00 and now the metal casing is almost too hot to touch after 10 minutes of reading a standard DVD. The keyword 'bu40n 100 firmware hot' led me here."
If you have successfully downgraded to 1.00 but your drive is turning into a space heater, try these proven solutions:
| If you... | Then... | | :--- | :--- | | Use your BU40N daily to rip discs | Flash to 1.03-MK immediately. Your drive will thank you. | | Use your drive once a month for 10 minutes | You may survive on 1.00, but still, why risk it? | | Are a collector preserving a rare 1.00 drive | Buy a second BU40N. Keep one on 1.00 (in a box), use the other on 1.03-MK. |
This guide assumes you have a Windows PC and a USB-to-SATA adapter (or an external enclosure that can put the drive into "flashing mode").
After rebooting your PC:
Result: You should see a 10-15°C drop in peak operating temperature while retaining 100% LibreDrive functionality. bu40n 100 firmware hot
The interest in "BU40N 100 firmware" highlights a common user desire to maintain and customize hardware. Whether seeking better compatibility or region freedom, understanding the distinction between official updates and modified "hot" firmware is crucial. By approaching the process with caution, verifying model numbers, and using reputable sources, users can successfully manage their hardware without risking damage. Ultimately, knowledge and careful preparation are the most helpful tools in any firmware modification endeavor.
Disclaimer: Flashing firmware carries inherent risks. Always verify the source and compatibility of any software before applying it to your hardware.
The is a popular slim internal Blu-ray drive, often rebranded by vendors like Verbatim, that is highly valued for its ability to rip 4K UHD discs once flashed with "LibreDrive" firmware. Flashing the
to 1.03MK or 1.00DE firmware is the standard "hot" tip among enthusiasts for bypassing AACS protections and enabling unrestricted read speeds. 1. Pre-Flashing Requirements
Before you begin, ensure you have the following tools and information ready:
Identify Your Current Firmware: 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 slimline SATA drive. If using it externally, ensure your USB enclosure provides enough power. Many users recommend a powered USB hub to prevent the drive from disconnecting during the flash. Software Needed: MakeMKV: To verify LibreDrive status. The LG BU40N is a slim, slot-loading 9
SDFTool Flasher: The community-standard GUI tool for flashing UHD drives safely.
The "All-You-Need" Firmware Pack: Available on the MakeMKV Forums. 2. Recommended Firmware Versions
Choosing the right firmware is critical to avoid bricking your drive or losing performance:
1.03MK (Most Recommended): Generally considered the most stable version for 4K UHD ripping.
1.00DE: Often used as a reliable baseline "UHD Friendly" firmware.
Warning: Avoid official v1.04 or newer original LG firmware if you intend to rip UHD discs, as these versions often block the features needed for LibreDrive. 3. Step-by-Step Flashing Guide
Extract the Firmware: Download the firmware pack and locate the HL-DT-ST-BD-RE_BU40N_1.03MK.bin file. User quote from forum archives: "I flashed my BU40N to 1
Run SDFTool Flasher: Open the tool as an Administrator on Windows.
Select Your Drive: Ensure the correct BU40N drive is selected in the dropdown menu.
Load the Firmware: Click the button to select the .bin file you extracted.
Check "Encrypted FW": If the firmware you are using is marked as encrypted in the guide (common for 1.02/1.03 versions), ensure the Encrypted FW option is checked in the tool.
Flash: Click "Start" and do not touch your computer until the process completes. Interruption will brick the drive.
Verify: Restart MakeMKV. The "LibreDrive Information" should now show Status: Enabled. 4. Troubleshooting Common Issues