This is a power invert fault, there isnt anything you can do from a factory rest point of view.It will need the power regulator replaced, however before doing this the engineer will need to check the main board, since if it was a surge which caused the issue it may have damaged the main board, which would make it uneconomical to repair.
Is there anything else I can help you with, or clarify for you?
where can i take it. do we still have tv repair men?
LG have designated 'partners', what is your post code and ill look up somone for you
Or if you prefer you can go to this website, which has the details of the designated repair party, and the option to search for your nearest one.http://www.lg.com/uk/support/repair-service/find-repair-provider
If there isnt anything else I can assist you with, I would appreciate if you can rate the level of service you have received today.Have a good weekend.
ng16 5ly jacksdale notts
Could you please give me the model and serial number of the TV