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Elllo iv got a lg 50pc3d tv the tv blink 16 time wont open ive test my voltage and thats what it give to me original value 3.3v ---> 3.2V in real time original value 5v -----> 6.2V original value 6v ------> 7.4V original value 12v -----> 14.7 original value 19v ------> 24V would it be a powersupply? can u help me with this

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Not sure if it is a power supply issue for sure, but I've had a similar issue on an older model LG LCD TV. My symptoms were: in the middle of watching TV the screen blinked a magenta color for a moment and then the screen went blank, the TV would seem to turn off and on but could not get the screen to show anything, my power light would also blink 13-16 times and was delayed when turning off. after researching this forum I found a fix. Mine was a problem with a damaged capacitor on the power board it was a Samxon 2200UF 20V capacitor that had a slight bulge on the top. If you remove the back panel of your TV and locate the Power Board (the circuit board that the power cord plugs into) check and see if any of the capacitors on this board have any bulges at all they may appear very slight but will be on the top. If you you find any with bulges they are most likely defective. Remove the circuit board and de-solder the damaged capacitors with a soldering iron from the bottom of the board, and replace with a 2200UF capacitor (or whatever UF value is associated with the damaged capacitor) with a higher voltage rating of 25V or higher that way they will run cooler. Be sure to note how the original capacitors were put in (which side the negative connects to) to avoid damaging the new capacitors. I was able to find the capactitors at a local electronic store, but you could also find them online. The capacitors are $2-4 dollars each and a soldering Iron is approximately $10 at a local radio shack. This fixed my TV, cost me $12 with a soldering Iron and took approximately 1 hour to repair. If you do not see any damaged capacitors then it may be another issue, but it is a simple process to check, Again I did not perform this on the same model TV, but it was a similar symptom and an LG. Good luck!

Posted on Mar 26, 2011

  • frankgaz20 Mar 26, 2011

    ive changed 3 caps for caps with same uf and Voltage
    but it didnt works
    the tv open black , blink 16 times.
    im not able to chg channel , there's no display but a black screen



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Led power light comes on but screen will not come on.

"Blinks a few times" implies the TV is flashing a fault code at you. If you can find a service manual for your model, count the number of blinks and look it up in the diagnostics section.

However, the most likely problem is a burned-out electrolytic capacitor in the power supply. These are usually easy to identify visually; the top of the can-shaped capacitor should be flat, but may be bulged out and may have brown or black material leaking from the vent scores. The photo below shows a bad capacitor to the right of a good one; both have black plastic sleeves.

If this is the case, replacement capacitors are relatively cheap. However, you should look for the following criteria in choosing a new part:
>Capacitance (uF): same as the original, or 10% higher if the original value is not available
>Voltage: same or higher
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>Physical size: should fit in the space occupied by the original; if buying a taller unit, make sure it will fit when the back cover is reinstalled, and make sure the capacitor will not touch heat generating parts such as heat sinks, resistors or large transistors.
>Ripple current: get the highest available without compromising too much on endurance. Ripple current may be specified in mA or A; 1 A = 1000 mA. Sometimes you can get a better rating by going to a higher voltage part, but physical size may be a limitation.
>Endurance: Try to get 8000 hours or better.

I usually use Panasonic FR1 series capacitors, although United Chemi-Con EKZN capacitors are also worth a look. 25351068-tkog3zu3xmxabptjkcidpctj-1-0.jpeg

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That's why I say people, do not trust power blinks, trust service specialists with experience.

Any short in any board connected to the power supply would result in , well, short at the output of the power supply.

The monitoring logic would, in turn, read that as lack of voltages and would report is as bad power supply.

Except the problem is not in the power supply, but in the external module which has shorted!

I am about to write a short and helpful article now on troubleshooting plasma TV for problems like this; I am about to post it on my blog at .

Hope it will help you!

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Easiest way to tell if you're going to go into your tv is to try to unplug your Y and Z boards and turn it on. If it turns on and stays on chances are one of those two boards are bad. 

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