They swap in one then the other. Given the cost of tech time they may not swap in the old board if it took 2. Boards are cheaper than the repair hours. This can really upset folk used to the days where techs tried hard to find which part it was.
My Samsung LED SMART TV started recycling al of sudden. As soon as I turn it on it starts booting and it would turn off. I don't hear any clicking noise.
When I opened the TV nothing looks out of place. I reset the power to switch below the TV that is also used for remote infrared, by removing the wire from motherboard. TV started working fine. 2 days later same problem again. This time again I disconnected the power cable from power board to motherboard and once again everything back to normal.
Obviously unscrewing TV and unplugging those wires is not feasible solution. I'm confused what is broken here. Is it power supply board or the power switch?
TV mode number UN46EH5300XZA.