I've had the set since Christmas and this problem just started. After a variable length of time, the set will power itself off and then back on. The routine lasts about 10 seconds and once it begins, it will continue every 5-8 minutes. I have done a reset, unplugged the power for an hour and taken the batteries out of the remote trying to pinpoint and clear the problem. Any ideas out there? The set does feel warm to hot on the back panel...but I'm not sure what the standard temp would be for the set while operating normally.
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Re: tv powers itself on and off
You have a problem internally caused by heating (set is on for a few minutes) and then cooling (set turns itself off for a few minutes). Most likely a "cold solder joint" or a bad component on the power supply board. Locating it yourself can be difficult. If still under warentee you'll need to take it in or have them come out. (whatever is in your contract) They'll simply replace a circuit board instead of trying to fix it.
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Lightning damage on LCD TV's can be a doozie. You really need to get it checked out by a qualified technician. I've repaired several TV's hit by lightning, most of the time the damage was limited to the power supply board. However, it is possible that multiple boards were damaged. If multiple boards were damaged, it's not worth repairing the set.
Seems like your set now has a poltergeist in it after all these years. If set turns on an doff by itself and works erratically there could be a power supply issue since it supplies the juice for the various areas to do their thing. If PS is messing up, so will other sections of your set.
Tries tv unplug,replug it back like about an hour later.Most of the times tv will resetting itself back to the factory setting and will work again.If still have the same problems,tries pushes the power button on/off a couple times for trying to fire up the tv Tuner signal board,these off/on tries work with many LCD/Plasma HD tvs.But this kind of problems,eventually u have to change the tv Tuner signal board sooner or later.Because the tv Tuner signal board it is dying,and this solution is just a temp fixed for the delaying it for awhile.
Tries unplug,replug it back like about an hour later.The tv now,will resetting itself back to the factory setting.The tv now should work.If not the power LED light indication on the LCD screen panel flashes or take 2 or 3 mins picture to come on.The problems is the tv power supply board,that the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.If tv was bought and it under a year old,call Samsung Corporation for a warrenty repair.
I'm having the same problem with the same TV that I bought my daughter for Christmas.
I haven't tried this myself yet, but it is suggested on another website that the TV is switching on to look for software updates during the night. Apparently you can switch the auto-update feature off, which fixes the issue.
capacitor problems in power supply or a regulater isolate the power suppley by disconecting the line output stage/unplug scan coils for example and run a 60w bulb as a dummy load one wire to earth and the other to rail voltage colecter of line output transister if the bulb glows steady the power supplys fine