Question about Proscan Televison & Video

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Proscan 55" TV flashes 3 or 4 times after turned on then says "no signal." After turning off and back on again it starts normal with picture. What causes this?

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  • Proscan Master
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Tuner AGC voltage deviates. Contact any service technician. This fault can't be set right by a normal user. If you wish to get some details; visit the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/

Posted on Jan 02, 2017

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Posted on Jan 02, 2017

ginko
  • 19396 Answers

SOURCE: HITATCHI ULTRAVISION P50S601...POWER LIGHT BLINKING...WONT COME O

The TV is on protect mode.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

Also ensure that the fault is not coming from a faulty receiver box sending bad signal, check if you get same problem with no receiver box or dvd connected.

If that does not work, and you keep having a flashing led on front of the TV, and tv turning off by itself after a while, that indicates a fault condition.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible reasons.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , startingthe flashing light.


If you are in situation one, then theTV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

Common faults that can occur are a blown capacitor on power board, a convergence IC has blown, or a fault on Digital board.

Check also the video cable or any external connection cable, if the cable is shorting, or the connector is bad, you can get same flashing state because of the video cable.


If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

Posted on May 22, 2009

  • 1 Answer

SOURCE: 55" TV keeps shutting off automatically

Green light flashes 5 and then red light flashes 6

Posted on Sep 28, 2009

  • 8457 Answers

SOURCE: the hd tv keeps cutting out and saying no signal

It not the tv,u restart the Sky HD box the signal come back right?The Sky HD box is the problems,replaced the box,u will solved this problems.

Posted on Apr 22, 2010

  • 8457 Answers

SOURCE: When I turn on my

This problems very common on a LCD tv.It the tv power supply board,have bad dying capactors,these capacitors are alway bulges or puffing up on it tops.That the board,where the power a/c cord plug into it.U have all the tools,know basic electronic and can do basic soldering?Just check the power supply board,for those dying capacitors that bulges or puffing up on it tops.Replaced these dying capacitors on the tv power supply board,ur tv will power up normal again and have no more clicking sounds and will not take anymore 2 mins or more to turn it on.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Posted on Nov 25, 2010

  • 4 Answers

SOURCE: Vizio m550nv led lcd tv. Problem began a couple

I had same problem. Unplug set for 10minutes then plug it in and let it go thru it's startup routine.

Posted on Jan 27, 2011

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When i try to turn the tv on it does it just clicks over and over


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.
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1 Answer

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