Sony KV-27FS13 27" TV Logo
Joe Tracy Posted on Oct 18, 2006
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No picture No sound

I am having the same problem when I turn the tv on I get no picture or sound, you can hear it turn on but then I get the 4 flashing standby lights at the bottom. I have tried unplugging the power to rest it but still nothing. Please someone help me.

  • MyIngham Dec 06, 2007

    Power light flashes, no picture or sound

  • Anonymous Dec 28, 2008

    NO PIC NO SOUND FLASHER 4 TIME 

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  • Contributor 68 Answers
  • Posted on Oct 19, 2006
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I agree with techman, but I call it the start-up supply, which gives the Switch Mode Power Supply Intergrated Circuit, a supply (V+). This supply is about 10 to 30 Volts and supplies a few milliamps of current to the integrated circuit (SMPS) which starts giving out pulses. The pulses switch on and off the Line Output Transistor, or a Power Transistor which energises a transformer. The transformer provides all the voltages required to work the rest of the circuits. One if these voltages takes over from the-start up supply. The failure is usually the Power Transistor, or the Transformer (line output). Replacing the Transistor will usually bring the set to life, but it may fail again due to the fault which caused the transistor to blow. The only solution is to get a service engineer who will check the components before switching on again.

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  • Master 3,130 Answers
  • Posted on Oct 18, 2006
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This is an indication that the sweep power supply did not give the turn on pulse from the SMPS, thats the main power supply. If you know how to use a multimeter I will send you the instructions to troubleshoot this supply. Or you may need to trouble shoot the sweep supply as well. If you have no electronic or solid state repair experience, Please stay safe and call in a trained tech to assist you with this repair. Good Luck PS please rate this thread

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