Possible Solutions: With the TV powered ON, Unplug it and wait for 30–60 seconds and then replug it. Check if you are able to get to the MENU screen. If menu Screen appears then check for the reset options in the settings. If it does not shows any thing except the logo then the TV needs to be serviced.
I came home today and turned on my TV to see that it does not get past the startup screen. Remote works, buttons work, I can see an image .
Offhand when the LG welcome screen is stuck on the set, this means the mainboard has locked up, and in most cases needs to be replaced.
Press and hold the Volume Down and Power keys simultaneously until the device reboots. Typically this will take 11-12 seconds. Release the keys when you see the LG bootup logo.
My TV wont even boot into the menu. It turns on and displays the lg splash screen then goes to a grey screen with the coloured rotating dots .