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Re: Akai 42 in. PDP4294
The high voltage power supply for the plasma display has failed. It may or may not be on a separate board that could be replaced the owner.If you find a separate board, it may have its own fuse which you could check for continuity with an ohmmeter.
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the red blinking light usually has a pattern that gives you a code to the possible problem. Maybe you have a bad power supply board. You have to open the panel and do a few tests on the power supply's outputs to be sure. It produces a variety of voltages for different parts of the tv ie. the plasma display panel and the audio system. The components supplying power to the audio system may have failed a year ago and recently the pdp.
plasma tv's are expensive to repair, most of the time you can get a better tv for the same price. You can reduce that cost by learning and troubleshooting it yourself.
I had the same problem I was told to unplug then reset but still no luck. Mine have been broken since Aug 2006 and seems like it's so hard to find somebody to fix it. Please let me know if you fix yours.