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Lg plasma power problem picture screen work 42px3rvc

My LG plasma model 42px3rvc just stopped working. Every time i turn it on it just switches straight back off after about 5 seconds. just wondering if anyone could tell me whats wrong... if i could fix it myself and if not how much am i looking at.

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One board can cost 150 to 350 dollars (ONLY one and only the part plus labor) problem really frequent one board or two board often blows. About if you can, the service process is kind of hard to drop the tv from the wall unscrew like tons of screws and finally to find the short circuit, buy the part (s) and install it (em). Hope not adjustment needed after works (commonly YES) and Hope the board doesn't blow again because another problem was there before.

Posted on Apr 17, 2009

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Posted on Jan 02, 2017

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42 inch LG Plasma TV Lost Picture


Hi it sounds like it has had an elctric fault like a resistor failing.
The click you heard would be a internal switch that cuts off the elctric supply to the screen to stop furthe damage hapening.
It could even be something simple like a bad solder and in that case will need locating and resoldering.
How old is the telly and how often is it used.
When you switch it off leave it off for about an hour then try again if you have allready done this then it probably is a blown resistor are you sure nothing has been pressed on controll have you tried seeing if you can acess the menu screen via the remote and see if that comes up on the screen let me know ok

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Ought to work with HDMI. Suggest to try before buying or have a Return policy.

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Hi, i have an LG plasma, model number RT-42PX11.


You need to pull the power supply out and replace the damaged caps on the board. Look for swollen, pushed up tops and leakage around the base of the caps.

You need soldering and basic electronics skills. You also need to pull apart that big tv and pull the power supply board!

You can look on Ebay for pullout boards from people who have broken their screens. It can get you a working board for cheap sometimes!

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Hi there!
Ysus and Zsus Boards are normally sold as a kit(about 39 - 50 US$). If you think you are able to remember where all panels and screws are removed and replaced, then it would probably be cheaper to do yourself. On the other hand you may be throwing money after money if it is a power supply fault. I would start by checking the component which exploded and its location. That way you will know where to start. If in doubt rather refer to service technician. Please note: High Voltages are present so do unplug before inspecting or removing the cover. Also do not put the screen on its face, it may damage. Always in upright position. Good Luck, JUS004

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