TH-42PX60U that has no power and no LED light coming on. Breaker is good and I have replaced the power supply board. Is there another board in the set that would prevent the power from coming on?
Please forgive me if this sounds offensive to youor intelligence, but let's eliminate the obvious , (and free) things first !
I had a similar scare with my used LG HDTV. I had it plugged in to a "Surge Protected" power bar that had 4 of the 10 plugs "Surge Protected". I don't know why, but the TV was plugged into a "Surge Protected" plug, and ZIP!! No power ! Why did I buy a used HDTV, how could I be so thoughtless !. But then, as I noticed my lamp plugged into a non-Surge protected plug, was working, so I plugged the HDTV into a regular plug & "TA DAAA !"
Check also to see if the powre plug, often is removable, just maybe look up in your manual "FIRST" and see if you can find if the power cord is removable, if so, the cat hitting it by accident, once, or repeatedly, as with a friend, can slighly remove it. See if this simple thing will take care of it. Sometimes we move things around, and enough stress on the power cord can partially remove it, or there is a permanent "bend damage". Contact the manufacturer to see if you can replace it with the removable power cord of some other appliance, an old "Boom BOX", or how much is a new cord (a lot less than a trip to the repair shop.
Did the kids play with the remote and accidentally set the timer, and it went off as it was told to do so ? If your "Plasma HD TV" blew something, feep in mind how hot these things get, try to make sure they have as much space as possible to keep cool, and extend the life of your "loved one", the HDTV that is !
Never be to quick to be upset, and you'll be surprised how simple things can fix it, or all the great people on "FIX YA" will help out. "DON"T BE SHY !!"