The lg is a smart tv that hdmi problem happened and it was killing me as i'm sure it's killing you too.. i tried a ton of cables blah blah the pc worked when i used any other monitor.. i turned on the tv and went into the menu found a f.w and software updates one was for the hdmi not being detected right.. i updated and have been fine every since so i'd go looking in your tv settings if not go to the website and see if there any updates they usually just get placed on an sd card or usb drive.. hope you get ity all worked out man..