I have a 46" Samsung LCD
TV, Model Code LN T4669FX/XAA. About 8 years ago I replaced the two 2200uf caps on the BN44-00168B SIP460A SAMSUNG Power Supply, LNT4661FX/XAA LE46S86BDX/XEU.
Starting last year when turned, on it would present a varying light/dark gray
mottled screen. After several off/on attempts, it would work properly. I started leaving it turned on 24/7 and that worked for a few months.
Recently, there were green streaks horizontally and would turn off and on for a couple of seconds. There were repeated sound interruptions requiring off/on switching. Last week when turned, I got a momentary picture, green screen, no sound, and off.
I pulled the power supply board, figuring the replacement caps had died again. They appeared fine, with no sign of defect. I visually inspected the PS board with no obvious defects.
I considered buying a new PS, but I prefer to find the problem before moving on. I also inspected the other 2 boards, but nothing was obvious.
Thanks in advance,