At the shop I can swap a suspect board until I find it. No tech I know can nail it the first time everytime.
However the age issue points to our old friend BAD CAPS. Google that and inspect all boards for that issue. The criteria for this is perfection. There is no second place, looks OK. These must be perfect.
I bought this TV back in 2008, it was and still is a great TV, but for the past couple of years or so I've been having an issue with the TV not being able to get a signal when first turning it on after long period of it being turned off.
I have an Onkyo reciever with all my components (DirecTV box, PS4, XBOX 360, DVD player, etc) connected to it. I use a Harmony remote to start my activities and turn on the appropriate devices (i.e. "watch TV", play playstation), etc.
However when I first try these activities in the morning when everything has been turned off for a while, the TV struggles to find a signal. I will get a picture for a moment, then it goes back to the blue screen saying "no signal", it then goes back to the picture, and then I get a snowy screen, then "no signal" again. It does this song and dance for about 5 - 7 minutes, and then the picture on the screen stays and I have no other problems for the rest of the day. It only occurs in the mornings, or when the TV as been off for a while.
I thought it was the receiver, but even when connecting my PS4, and direcTV box directly to the TV and leaving it this way overnight and trying again in the morning, I still get the same "no signal" issue.
My guess is a component in the TV is failing, but I do not know which one. I replaced a couple of fans that failed years ago, and recently I replaced the DLP chip last year to fix the white dot issue, but unfortunately, it did not fix the "No signal" issue.
Any one else have this issue and know how to fix it? I have no problem going into the TV to replace a failing part, if that's required, I just don't want to waste my money on a part I don't need.