I have a Sony 65 XBR-65X850B non-android and all of a sudden it would click off and click on simultaneously. Any idea on what the problem would be?

It amazes me how many people change boards not knowing much about fixing TV's or how the boards work and what each is supposed to do, such a waste of money. According to Sony service information you're getting the code for over current draw of the LED backlight circuit. Several diodes in the strip are bad, this set is edge lit it only has one strip with a defusing screen to spread the light. IF you can find a replacement strip that should fix the set but like most Sony parts they are expensive and hard to find in a lot of cases. If you find one another thing to watch for is getting the defusing screen back in correct or the picture won't look right, also the screen is quite heavy in this set and must be handled with suction cups, if you try to remove or replace it without them there is a good chance you will break the screen.