My LG tv ls 3400 while power on its flashes the lg logo for a moment then goes blank but sound is available .
i tried the torch test and the screen is on . i had changed the back light 2 years ago.,
what would be the problem?
Your question is about a television and you've posted it in the laptop's section. Are you using a laptop to connect to the TV? If so, rule out that the cable is the issue by changing it out and or trying a different display input port.