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LCD TVs - LED

my samsung tv doesn't turn on

gregorio montero
hace 5 años
hace 5 años
greetings friends I have a plasma tv model: pn43e450a1fxzc 42 "I was watching the TV at night then turn it off, in the morning I find out that the power went out, ok, when I turn it on in the morning I notice that the LED that It indicates that this energized is blinking I try to turn on TV and it does not turn on, I need your help friends, and at a medium voltage that feeds me a rectifier bridge, 120volt ac and 167volt cc come out, I measure capacitors well all and all diodes well, what else can I do?
gregorio montero
hace 5 años

brother the tv just blinks continuously after plugging it in, it doesn't turn on either by keys or by remote control

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Canario2016
hace 5 años

If it turns on, but starts blinking .... Voltages that the power source sends to inverters, inverters or lamps ... but we are already talking about high voltages, better check only that the power source sends the correct voltages and stable.

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gregorio montero
hace 5 años

ok, in case the voltages measure them well in all the exits, I have to make sure that they stay, the one that comes to vary me I follow it on the track on the card from where it comes from right? and check all the components where it passes until you find the element that is causing me to fall, is it correct? from the transformer to the output where I measure that voltage? Brother, I'm not as expert as you, and thanks for continuing to help me, I noticed that the card where the antenna signal is taken and the HDMI ports was contaminated, I cleaned it, then I installed the source and I told you.

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FatBoy
FatBoy
20
hace 5 años
hace 5 años
Regards Gregorio, the problem may be cold welding at the power source , I commented that a few days ago I was taken a 42 "Samsung plasma TV (the model I do not remember), which presented the same symptoms, I proceeded to check the power source and found cold welds on the pins of the high frequency transformer, remove the cold welds and apply new welding on those pins, the television turned on without problems for about 4 hours; the next day the I tried again and it worked for about 20 minutes and it went off by itself, I checked the power source again and now I had cold welds the relay pins that are close to the high frequency transformer, I corrected the cold welds and the television has been working without problems for about 5 days, I hope my humble comment, Best Regards, will help you.
gregorio montero
hace 5 años

thank you friend, indeed, cold welding on 2 output pins, thank you very much

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Canario2016
hace 5 años
hace 5 años
Does it turn you on using tv keys? Maybe the command has a problem. The next step would be to verify that the command is sending a signal, then check the power source voltages, etc.
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