If you share your (found in Settings → Device Preferences → About → System Update), I can give you more specific user-reported feedback on that exact build.
The safest method:
Firmware is the low-level software embedded in your television’s hardware. Unlike a standard software update that might only affect the Android TV interface or pre-installed apps, firmware directly controls the display drivers, audio processing chips, input lag, power management, and bootloader. firmware tcl l40s6500
Common failure indicators: