switch tv to come on and comes on then goes to standby

switch tv to come on and comes on then goes to standby

my LG LN540OU switches to come on and then picture displays for a couple of seconds then switches off to standby

ANSWERS:

andrewjohnson16 sounds like you are having issues with the power board. Remove the back of your TV and take some pictures of your boards. Post those with your question. For that use this guide