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PN64D8000FFXZA shuts down on its own and will not turn back on, but eventually does after unplugging for awhile or removing the back cover and then putting it back together.

I own a Samsung Plasma tv, model PN64D8000FFXZA. I have been having intermittent issues where the tv will just shut off and go into stand by mode. It then will not turn back on. It will attempt to, but I will not hear the click and the power light will just flash before going back into stand by mode. There is no image at all. I've taken the tv apart several times to check for bulging capacitors, but they all look good. After putting the cover back on, it will usually start working normally again. Sometimes when I unplug it and let it sit for an hour, it will also function normally again. A couple days ago, I got it working again by taking it down from the wall mount, standing it up on the floor along its bottom edge, removing the back cover, then it turned on normally. I put the cover back on, rehung it on the wall mount, then it wouldn't turn back on. I want to say it's the power supply causing the problem, but I'm not certain. Before I start throwing parts at it, I thought I would get your opinion.

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It is a waste of time to even try to fix it as the parts will more than likely be obsolete.

Posted on May 19, 2017

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Posted on Jan 02, 2017

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2 Using a Phillips screwdriver, remove the single screw affixing the lamp cover (the small, grill panel on the back of the set) to the chasis. There is also a grill that is held in place by tension. Just "pinch" the thumb clamp on the bottom of the grill and slide it out. This is the same procedure you would perform to change the lamp, except in this case you will not need to remove the lamp itself.
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The safety switch exists so the user does not accidentally remove the lamp door while the TV is on. Doing so could, theoretically, result in burn or electrocution. This spring loaded switch causes the TV to shut down when the door is opened.
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If you have recently moved your TV, it is very common for random shut-downs to occur. This is because the move has shifted the flimsy plastic chasis of the TV, thereby loosening the contact between the lamp door and the switch.
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