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When the tv has been unplugged it won't come back on.

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Fault in the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Posted on Apr 30, 2015

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Try unplugging from outlet for fifteen seconds. Press the power button for a few seconds "before" plugging back in. Now plug back into the wall outlet and try turning it on to see if this reset the TV's settings.

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Try unplugging the TV.. After you plug it back in it may be OK. I had a similar problem were I could not turn on the TV (JVC). The owners manual specified in the troubleshooting section to unplug for 1/2 hour. I left it unplugged overnight and the next day plugged it in and it was fine.

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It sounds that, the memory IC to your TV has damaged. This IC can be located very near to main system control IC. A very small one, with 8 solder terminals. Even though it is very small, function of it while the TV works is great. The work is a semi-skilled one, and you must have some knowledge in electronics to proceed.

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1 Answer

I've owned for approx 3 yrs. Today I was watching a show on my Panasonic TH-50PZ80U and all the sudden the sound went away. From the lowest volume setting to the highest, no noise at all...Please...


Hello!
First move: unplug your broadcast provider's box, wait for a minute, then plug it back into power source. I mean: leave all the connections intact, just unplug from power source. It might be just power cord or power adapter. If that's not the case, please do the same with TV. Unplug it from wall outlet, wait a minute, plug it back in. It's a next step, if your "box" won't take care of the problem. If that won't take care of the issue, refer to owner's manual for "reset" procedure. Worst case scenario: you might need to replace main board inside or your TV.
good luck,
Thanks,
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1 Answer

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Unplug,replug the tv back like 24 hrs later.That the whole tv is resetting itself everythings.Tv now should be working again.If still have the same problems,than ur tv DM power supply board is have dying parts,must repair the tv DM power supply board to fix the tv.

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Tries unplug,replug the tv back like an hour.Now,the tv is resetting itself back to factory setting.The tv should work again.If not,the tv Tuner signal board have problems.Tv is less than a year old wright?Call Sony Corp. for a warrenty repair.

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