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My tv turns on with sound but no picture then turns itself off after a few seconds

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Best thing to do is unplug your TV for about an hour.
Check the connections to the TV.
When you plug your TV back in, it should reset itself.

If the problem still occurs, a part inside your TV may have went bad and causing it to shut down to prevent further damage. They call this "protection mode".
When this happens, taking the TV to the repair shop is the only way to find out what needs to be replaced and how much it cost.
Good Luck

Posted on Feb 18, 2009

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ginko
  • 19396 Answers

SOURCE: Tv Turn sound on, No Picture, turns itself off within seconds

The TV is trying to go on protect mode because an internal fault had been detected. For that reson the protection circuit keeps turning off TV continuously.

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

Posted on May 23, 2009

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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