A failed firmware flash can "brick" your drive (render it permanently unusable). Ensure your laptop is plugged into a power source and do not turn it off during the process.
Search for "Firmware Update for Matshita Blu-ray." 2. The "Updated" Firmware 1.10 and Beyond matshita bdmlt uj240as firmware update updated
Once the process says "Success," restart your computer immediately to initialize the new firmware. Troubleshooting Common Issues A failed firmware flash can "brick" your drive