TCL C755 QD-Mini LED 4K TV

What can I do if the TV has a horizontal line?

What can I do if the TV has a light leakage?

What can I do if the TV has cross lines issue?

What can I do if the TV has no power at all?

What can I do if the TV cannot start up successfully from the standby status?

What can I do if the TV keeps restart/power on and off always?

How to reset the TV to the factory default settings?

TV displays a black screen and the standby LED lights up.

TV displays a black screen and the standby LED lights off.

Unable to identify upgrade file with USB upgrade software

TV cycle power on and off after USB upgrading

TV cannot be turned on after network upgrade

No network upgrade prompt

Network upgrade failed

Incomplete Network Upgrade