Question about LG 42PX5D 42 in. Plasma HDTV

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No power tv turn off at first on [instantly i turn on]

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Re: no power

I used my plasma 42'' model MT-42PM11 about 3yrs ago i found out after a week that there is black middle bar on the screen how to solve this issue.

Posted on Mar 26, 2008

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How do you repair a Samsung LED tv that will not turn on and has a standby light?

Scott, most probable there is a failure on the power supply board inside. Often the capacitors on this board will receive a surge and then fail.
I will post links to help you trouble shoot and purhaps allow you to fix.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

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Tv wont power on

If you have a light flashing, it might be the lamp has burned out.
Also the instant on power supply may have failed. Hard to tell anymore from description...

Dec 23, 2013 | Sony KDL46EX500 46 in. HD-Ready TV

1 Answer

TV will not turn on, it just clicks.

Check the output voltages (usually marked on power board) to see if at the moment of turn on they come up and or instantly go to zero--a way to see if something down stream is pulling voltages down.

If power board did not cure it could be main board or another board--I have seen some where the display panel itself was bad and causes this problem--that is fatal.

May 30, 2012 | Flat Panel Televisions

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Samsung Plasma tv pn43d450 tv wont turn on

If caps there not puffed or leaking voltages in and out of the power board must be checked next (right at turn on of the set) to see which come up and or instantly go off....this is the place to begin.

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Panasonic th50pz80 power supply testing

Voltages need to first be checked at the moment of turn on---into the supply to see if they all come up and stay.

If one or more come up and instantly go down---follow that line and disconnect plug going out of the supply and unplug set with it disconnected and turn set on again measuring at instant set is turned on.

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Just bought a new tv wondering why when you turn the tv off by the remote there is a blue light that stays on. no book came with the tv.

That a standard designs for most of the LCD and Plasma tvs these day.That is call a standby power,for the instant power up to the electronics components in the units of those devices.

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Overheat of Akai LCD TV and cannot turn on again, why?

Now the tv is turn on.Any LED power light indication on the LCD panel flashes at all or no light,nothing at all?Yes,than the power supply board it dead.That the board where the power a/c plug into it.But the Tuner board,that the board where the coalax cable brocast signal plug into,might also burn too.Tries websites like, to buy the refurbish power supply board for the replacement and the refurbish Tuner board also.

Jul 19, 2010 | Akai LCT3201AD 32 in. LCD Television

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