I have a LG 47LH40-ua LCD tv. Today after watching TV for a while the picture started to fade to white. Turned to a different input and it was still faded. Turned the tv off for a while and the picture returned to normal. Any ideas what this could be?

Good day

that problem is many causes its either power supply loose connectors or the worst is the main got partially defects..I give you some tips to fix that any of 3 causes that mention above..

first causes,,the power supply,,its gives the supply of all the system of the unit..when it is not functioning well or the output supply is two low or high.. Also your TV is not function well..
step to troubleshoot;
1) remove the cover by unscrewing of all screw at the back side of your TV
2) check the output voltage such as 5v,24vdc..By power on again and use a multimeter tester range it to DC..if there's a voltage drop..
3) check if there's a leak or bulging top capacitor..if any leak capacitor replace it

like this


Next causes,the loose connectors..

1)reset the all connectors that you see inside your TV by disconnecting it and connecting it again

Next causes is the main board,,there's no easy remedy of that instead of resetting the power such as off/on

thank you and good luck