It's iffy if it's worth replacing boards. You claim you don't have the Volt meter or know how to use one so for this one, get repair estimates.
Why? I have yet to find TV techs offer repair advice in forums. And with 50 inch models hitting 300 bucks, just a few boards and you are into a new set.
HDTV screen stays black and is not responding.
When I turned the TV on, there is NO picture shown. Its all black and even with a flashlight, I can't see anything in the background. No audio is heard either. The only thing that turns on and shows is SOLID GREEN light & the Sony logo on the panel Bezel. We tried unplugging, replugging from the wall socket, waiting a week or longer to try again, but nothing.
We took off the back panel and the Capacitors are not bulging & seem fine. After plugging and unplugging a few cables to see if there is anything loose, check ribbon cables, and disconnecting the power cords, now its doing a new thing. Kind of like removing the back cover caused new findings.
Now, when powering off The TV with the remote, the green solid light and Sony logo go off. But it only goes off when I push and hold the power button. So it powers off. But as soon as that happens, a RED light starts blinking 14 times over and over. The only way to stop that light from blinking totally is unplugging the TV from power.
I hope I gave you enough to go by. What part went bad & needs to be replaced? I read somewhere it was the Tcon board. I know where that is and we removed it to get the part number.
But also read it could be the MAIN board or power board. SOmetimes people word these boards different so please be specific. (one board has the area to plug HDMI, avi, coaxial, etc- and the other has the power part that you plug the power cord to).
I dont have a voltage meter to check things nor do I know how to use one. We once replaced 2 Capicitors on another TV from my family member with success. That was an obvious and easy fix.
Note that this TV was a hand me down so I have no prior use of it.
The TV is a 2009 model from what we know.
Thanks and I appreciate all the info you can share...