What I'm learning is there are several models of Panasonic TV's that have a video card that doesn't play well with HDMI applications and the end result is, you need to call this number and not only make arrangements to replace the bad board,but also this!
Your model doesn't show below,but I'd certinly inquire about the necessity of a "Firmware" update!,,,Panasonic knows FULL WELL they have a HUGE problem here!
Hope this helps!
At panasonic.ca I found the listing for the fw update under customer support-important notices
If you own a plasma TV with model and serial number within the range specified below, please contact our toll-free VIERA Concierge hotline service at 1-866-330-0014. A VIERA product expert will arrange an in-home software update for your TV at your convenience.
Model Numbers Serial Number Range
TH-42PZ77U
TH-42PZ700U **71250001 ~ **80189999
TH-42PZ700UA
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