Samsung UN55D8000YFXZA The red stand by light is the only thing that lights up, I took the back off hoping that maybe it was the capacitors, but they all look fine. when I disconnect the main wire from the power supply board to the mother board the backlights begin to blink on and off. Thoughts thanks,
Televison & Video - Samsung - LE - UN55D8000 55" 3D LED HDTV UN55D8000YFXZA
Answers & Comments
Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
Before going further; try a hard reset first. If it does not help you, replace the main digital board. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; visit the site linked here.