Chosen Solution
Using any type of input (antenna, HDMI, etc…), the same problem always happens: Sound always works fine, but image/picture keeps constantly turning on and off at around 3 second intervals or so. P.S: Currently don’t have the remote, so have to use TV buttons for any suggested fix.
Hi, Sounds as though there is a screen backlight problem or a screen backlight power problem Here’s a compilation of two images taken from the service manual for the TV that show the troubleshooting flowchart for a No video/ good audio problem and also the Power board voltage reference points.
(click on image to enlarge for better viewing) Hopefully a start
