Facing TV Problems? Ask a TV Technician.
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- Are you able to select HDMI inputs on input source list that appears when hit Input button on TV remote?
OK, have you tried to label the HDMI inputs (label inputs) by going into Setup menu of TV, this will enable the HDMI inputs.
Please reply back with the result.
OK, have you tried any other video source such as DVD/Bluray in HDMI input of TV?
OK, it seems your new A board is defective, please return it to supplier and ask for replacement A board. There is no other settings in TV to enable/ disable HDMI inputs function
I hope these info will help. If you have any additional questions, feel free to ask
I wish there was any other reason/ cause of trouble. HDMI ports are mounted on same A board, HDMI processor chip is also located on same A board. Only chance is to label the HDMI inputs by going into setup menu of TV that will enable them, since it didn't work then it is definitely hardware related issue/ A board internal failure.
I hope this new A board would have came with some warranty from supplier so return it and ask for another A board. I agree Panasonic plasma TVs A board has common problem with HDMI inputs failure and A board replacement is only option to get it fixed.