Chosen Solution
i have a samsung UN55JS9000FXZA it works perfect but randomly it will cutt of and power back on and will continue to work it does this sometimes within 30 minutes other times within hours im not sure if its a power board or main board maybe? hope to hear from you soon thank you
@omputers going by your description alone my number one suspect would be the power board. Let us know if your TV shuts completely off or if it just the screen that turns black. Also, try multiple different input sources (one at a time)and see if it still shuts off. Something like a bad cable box etc. can cause this as well. Remove the back from your TV and check all the boards. Check for damaged looking components etc. Post some images of your boards with your question so that we can see what you see. Adding images to an existing question
Have you checked to make sure the power cable is fully plugged in sometimes the cable can be slightly unplugged and work for a period of time than shut off.
Check the connection very well. If the power ups and down then this might happen.
