Are you keeping the vents clear with canned air every year?
Why I ask is because I find most folk unaware that these devices need a little yearly maintenance.
Model# LA40A550 mfg date 2008, The TV works OK when it works. it will start ok for an hour or so, then the screen shuts down with audio.
after the screen turns black it will not turn on by itself. i need to turn it off wait for a while and then again it turns on ok but not for long.
I have looked at it while dark with a flashlight and can see a faint video picture.
I have opened the back and looked at the Caps , they look OK, not swallwon or anything strange, i also checked the connectors and they are all in place. I need some advice what to do next, which and how board to test , as i am trying to fix it by myself due to shortage of funds, cheers.
Thanks for all