Question about Sony KDL40EX400 40 in. HD-Ready TV

1 Answer

BLACK SCREEN NO AUDIO POWER LIGHT IS ON

I WAS AWAY FOR TEN WEEKS. UPON RETURN I REACTIVATED VERIZON FIOS TV. SONY XBR BRAVIA LCD 40 INCH DOA. POWER LIGHT COMES ON, BLACK SCREEN NO AUDIO. ALL BUTTONS ON TV AND ON REMOTE HAVE NO EFFECT. VERIZON SAYS THEIR DVR BOX IS WORKING PROPERLY AND THE PROBLEM IS TV.
CAN MASTER POWER SUPPLY GO OUT AND STILL HAVE THE RED POWER LIGHT GO ON?

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  • eagle338
    eagle338 Jul 15, 2010

    What was the bad rating for? Is this some kind of a bad joke?

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  • Master
  • 4,889 Answers

Since the screen is coming on I do not think it is a problem with the power supply. It sounds more like a problem with the audio/video main board of the set. Is the set under warranty?

Posted on Jul 13, 2010

  • mlharrisfl Jul 13, 2010

    The screen is NOT coming on. Only the power light is coming on. "black screen no audio". The set is 5+ years old. No warranty.

  • eagle338
    eagle338 Jul 13, 2010

    In that case, yes I do think it is the power supply. You can confirm this by checkling for any faint glow on the screen. If there is none then the power supply has to be tested for voltage drops. I can find you a service manual if you wanna try a comonent level reply. Otherwise you may just wanna replace the power supply board

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