Try disconnecting all of your HDMI cables and plugging the power cord of the TV into another wall outlet. If this resolves the issue, you may have had a small power surge from either your wall outlet or one of your source devices. It is recommended to connect your TV to a surge protector if you haven't done so already.
SOURCE: panasonic model #TH-50PX75U wont turn on, it
Usually seven blinks indicates a Y sustain problem. Its either the Y sustain pcb and/or the buffer boards. I would highly recommend calling an authorized service center for this if you don't know what you are doing.
SOURCE: plasma 50 inches dont turn on
The power supply board is dead.Tries the websites like Shopjimmy.com,Ebay.com to buy the refurbish power supply board for the replacement.
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