Question about Panasonic PT-52LCX65 44" HDTV

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HDMI stopped working tonight! I used an HDMI switchbox for years with this TV, but tonight it doesn't respond to any HDMI signals, even if I remove the switchbox and plug the sources in directly. If I plug in my cable box (Motorola HD PVR) or my PS3, the TV shows "HDMI" in the top left corner, but the screen is black and there is no audio. If I plug in my Xbox 360, I get the video, but no audio. All these sources work fine when plugged into another HDMI monitor. The TV works fine with other inputs (ie. Component, etc.). I tried the TV's "reset" options (both from within the TV's menu and the "VOL- and remote OK" method) to no avail. Why would the 360 picture work, but the picture doesn't work for the cable box or PS3? Please help! I need the HDMI to work. Greg

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  • gsalter Jan 03, 2011

    No, I don't think that's correct. I just put in a second lamp (my old one that I took out when the LAMP replacement light came on a couple years ago, even though it worked perfectly), but nothing changed.

    Also, like I said, the TV works perfectly well on Component input, just not HDMI.

    And your solution doesn't make sense why the video works for Xbox 360, but not for the PVR or PS3.

  • brugal17
    brugal17 Dec 28, 2013

    hey Greg. i'm having the same problem you were having and was wondering how you were able to fix it before i go buying a new motherboard. Were you able to find a solution?

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The HDMI is a digital signal connector, in the tv is handled and decoded separately from the analogue connectors. Because of that the tolerances on the signal characteristics are much tighter so , if the chip is damaged even in the slightest way, it can no longer process the signal. The video from the Xbox is displayed because the signal generated there is most likely at the limits of the tolerances.
This is a hardware fault, that no reset will fix: the AV processor is faulty and the only way to fix that is to replace the motherboard.

Posted on Jan 03, 2011

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You lamp in the tv is probally burnt out you can replace them though.

Posted on Jan 03, 2011

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