We have a 56" JVC rear projection Tv. Model # AV-56P575 It has been working great for about 4years. The other day- the tv would just change to a blue screen after being on about 5 seconds, the tv shuts off and the power light starts blinking again. Once the power light is blinking, you can not turn the tv off- you must unplug it. Do you have any advice?

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