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I have a panasonic TH-42pz77u plazma. When I turn it on it turns its self off just as the picture starts to come on and audio starts. The light by the on and off switch then flashes 7 times continually. I have unplugged it to try and reboot but does not help. Thanks, John

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This could be a powe supply failure, or one of the boards is pulling too much current and thus the supply is going in to protection.

The set will require proper diagnostics to determine the failed board that must be replaced.

You will have to give the set out to an authorised Panasonic service rep for service. This is not something the corner TV shop will be able to reliably service.


Jerry G.

Posted on Jul 11, 2008

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Panasonic th-42pz77u has no picture.power light (red) flashes 7 times


seven blinks on this model is the SC board. it will need a new SC board and the software update for the new board. usually only authorized servicers have the software need to do the upgrade. but if you were to contact panasonic then they might be able to have it fixed for you for free since this was a defect in manufacturing. of course this depends on how long you have had the tv.

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I contacted Panasonic and it seems that they will take care of the problem even though the TV is out of the 1 year warranty. They are aware that this is a manufacturing defect, apparently. I'll follow up later to let you know how it turns out.

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(panasonic TH-42PZ77U plasma) the tv will power on but before the picture comes up it powers back off. Red power light is flashing.


in protective mode the tv does not turn on and light is blinking, typically we must proceed by elimination as some faulty sections are preventing the tv to switch on. unplug the output power connectors from the power supply until the latter stop clicking. if it is still clicking after every of the output rail have been disconnected, then the power supply itself is faulty.

hope this helps!

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