If the TV screen is too bright/dark, please follow the below methods to do the troubleshooting:
Try to restore the TV back to the factory settings: press the Home
button on the TV remote. Then select Settings-->Device Preferences-->Factory Reset.
If the TV has internet access, please check if there is a new version of software updated online or not.
Press the Home
button on the TV
remote, and select Settings-->Device Preferences-->About-->System update-->Network Update:
If the issue cannot be resolved, please feel free to call the TCL hotline for further help.
