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Proscan tv power light on - have to plug in and several time for picture and sound to come on

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  • Jose ramirez
    Jose ramirez Dec 11, 2016

    Thanks for the help - I'll get the part - right now Tv is on and we leave it on

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  • Proscan Master
  • 76,848 Answers

I would suspect the power supply PCB of the TV is defective.

Posted on Dec 09, 2016

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6ya6ya
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Posted on Jan 02, 2017

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  • 310 Answers

SOURCE: tv: why do I only get sound when I turn the TV on?

Exactly i do no the problem in the video section.

Posted on Feb 19, 2008

  • 5 Answers

SOURCE: LG 47LC7DF Green Light Blinks 16 Times - No Picture or Sound

The lights indicate what the issue is. Kind of like your check engine light in your car tells you something is wrong with the engine.

Posted on Aug 31, 2009

dave1645
  • 834 Answers

SOURCE: My polaroid TV will turn on but there is no picture or sound

blown caps in the power supply a 470m at 16 volt cap it will be puffed up

Posted on Sep 18, 2009

Testimonial: "You were right. It was blown 1000uf caps. Great job. Thank you very much"

circuitworld
  • 335 Answers

SOURCE: no sound and no picture. Tried several power

Its Your lcd control board or inverter boards causing this problem. Either board(s) need to be replaced, if the LCD control board developes a fault condition it will cause the inverters to strobe which in turn causes the backlight lamps to flicker .... if the dc-to-dc converters on the inverter board or series resistors open up this will also cause the same affect.....

Posted on Nov 03, 2009

Testimonial: "So..... How much to fix? Is it worth it. The unit came out of our toy trailer and has been used maybe 10 times"

budmrtn
  • 11361 Answers

SOURCE: My TV keeps on turning off by itself or will not turn on

Look for poor solder joint in the power supply board, its the inrush current limiter Thermistor (SCK-85, round disc ) clean both legs real well before resoldering, very common in this TV. Clean the legs and the PCB real well you may to scrape off some of the Green PCB coting to expose copper underneath, then bend both legs flat with the PCB to get more contact and soldering areas, this parts gets hot and cold (thermo cycling) when you turn TV on and OFF, so the soldering works must be really well done.

http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Posted on May 28, 2010

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Hello,

Hi
A common problem for these is bad capacitors in the power supply, Remove the back from your TV and look at the power supply on the left hand side.

You will see roughly around 9 x capacitors that are bulged / domed shaped on top usually these are valued at 3300uf 10V any that have bulged or leaked a brown like substance should be changed.
This will cure the problem as they overheat being sat next to a heatsink that gets very hot!
Try and change them for the same 3300uf but a higher voltage.
Hope this helps

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Thanks!

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