(Reset All) from the Settings menu to ensure the new software initializes correctly. Troubleshooting Common Issues USB Not Recognized
Keep holding the button until the screen displays "Software Upgrading" or the standby LED begins to flash rapidly. Wait for Completion The process usually takes 3–8 minutes. Do not turn off the power during this time, as it can "brick" the mainboard. 40-mt56s1-mae2lg Firmware
Key take‑aways:
If you install a version meant for a different screen size or panel (even with the same board number), you may end up with an inverted image, distorted colors, or a completely "bricked" (unusable) television. Always verify your Panel Number Product Information (Reset All) from the Settings menu to ensure