Chosen Solution
Everything turns on but picture is blue, if I quickly unplug and replug tv into power it starts perfectly. Is this a result of a faulty power supply TV is a Samsung 65 Qled. - QN65Q7FAM purchased 2017
Yes probably a faulty power supply, you could probably buy one on amazon or something for a pretty good price. just make sure the voltage and wattage are the same as the old one. hope this helps :)
@dmac61 measure the voltages on the connector for the main board cable. Measure on the power supply side. The voltages should be stenciled on the power supply. If all of those are present the issue will not be your power supply but most likely your main board. It always helps if we can see what you see. For that purpose, post some good pictures of your boards with your QUESTION. Adding images to an existing question - iFixit Repair Guide
