For when folk call in but don't arrange for service and repair that's about all that the users can do.
A few other things you can try short of being a TV repair person.
1. Be sure the set's cooling is not blocked. Do not place in cabinets or on the wall. Get out the canned air and after it's cooled off, unplug power and give the vents a blast.
2. Check on the Samsung site for your model to see if there is a firmware update. DO NOT USE YOUR TV FOR THIS. Old school. Check with your PC.
Samsung Plasma tv PN60E550D1FXZA, Older model but working perfectly, suddenly starts rebooting randomly. Sometimes it’s every 15 to 20 minutes other times shorter or longer. I have reset twice once using network connected and once without. The result is the same rebooting still a occurs. I asked Samsung and their advice was ,(I kid you not), “unplug it then plug it back in”