Question about Samsung FPT5084 50 in. Plasma HDTV

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Samsung FPT5084x/xxa will not turn on after being unplugged

I just got back from a trip, where prior to going, I unplugged all of my electronics. I got back last night and plugged everything back in and alll I get from this TV is a blinking red light and a faint churp. I have tried to turn it on with both the tv remote and the cable supplied remote. Neither will turn it on. It was unplugged for 6 days.

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Posted on Jan 02, 2017

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SOURCE: Samsung FPT 5084X won't turn on

Sorry, but welcome to the world of highly efficient, component-critical switching power supplies.
These are all of those things and the failure often is related to a specific type of component, an electrolytic capacitor. These are chemical devices and cheap ones fail easily, the most expensive take little longer but the primary value shrinks while the losses climb until the part cannot do what it should any more.
The main power supply is probably at fault and without some technical background and a couple of test instruments, you will not be able to do the repair yourself.
What you can do though is; unplug the set, let it stand overnight or at least several hours, remove the back panel and look for a separate board with mostly larger components on it; it will have a ferrite core (no laminations as with a line-frequency part) transformer on it and several larger capacitors which are cylindrical and mounted vertically to the board.

Before touching anything inside, especially on that board, allow several hours to be safe since the larger capacitors can hold a painful voltage charge for some hours.

If you see signs of overheating such as discoloration of the board material, it may not be repairable but if you can find a part number on the board, you might be able to buy the power supply and install it yourself but it will likely have the same problem eventually unless they have altered the design.
If there are no signs of heat damage to the board, there may be companies offering to repair it as a subassembly instead of repairing the whole set which could be much more expensive.
If you choose to replace or have it done, the power supply still may not be at fault since most are capable of switching on and off if a downstream problem is causing an overload.

Posted on Aug 27, 2009

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SOURCE: I have a 50 inch Samsung, Model FPT5084X/XAA that won't turn on.

Seems to be a chronic problem for this model. My list of service calls with Samsung is quite lengthy.

Posted on Apr 12, 2010

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