I have a 25FAR Nanao Monitor. Did a cap kit and everything worked for days. Then suddenly after running a couple of minutes white horizontal line, picture back then line again and shutdown into protection. Reflowed the section around the LA7832 IC and changed the IC. Picture for some seconds then white line and shutdown. If turned back on right afterwards no power and neck glow. After some minutes, picture then same behavior with shutdown after some seconds. Someone with a clue what to check next?