Apologies if this has been answered already, I did my best to search this thread (and other Samsung threads) to find a solution that works. I've read so many posts, I feel like my eyes are going to bleed...
A little over a month ago, my UN55ES7100 started power cycling. At first it was every few minutes. I took off the back panel to check the capacitors and none were bulging. After that (perhaps coincidentally), the TV would only power cycle after about 2 minutes of being turned on and would not power cycle again no matter how long I had the TV on. It was a small enough annoyance that I could live with it. Until yesterday.
A few days ago, it started power cycling every 3-4 minutes. Again, I removed the back panel and bezel. I made sure all cables were secure and that there was no scorching on any of the boards or cables. I replaced the batteries in my remote. I turned off all Eco Mode settings. I disconnected the network cable and made sure wi-fi was off. I did a factory reset. I installed the latest firmware from USB (version 2004.0 from the Samsung site, dated June 5, 2015). After the firmware update, neither the remote control nor the control button on the back of the TV would work. I unplugged the set for a few minutes, then plugged it back in and powered it up, then the remote worked again. While recalibrating the picture, the TV would power cycle every 3-4 minutes. Since then, it has gone back to power cycling after about 2 minutes of being turned on and from time to time, will power cycle up to 3 times before staying on.
Has anyone discovered a definitive solution to the power cycling issue? I saw Alzarius say that he disconnected the wi-fi cable. If anyone has a pic they could post showing where that is, I'll give that a try. If anyone here went through Samsung service (I'm out of warranty), what kind of cost did you find yourself looking at?
Thank you so much in advance for any help. I'm at my wits end!