Hello! we have a sony bravia KDL-40V4100. it is about 2 years old. yesterday, the tv began doing this weird cycling thing; the picture and sound will be fine for about 30 seconds, and then the audio will go off, the picture will go black and then it will come on again. and it does this over and over again; intermittently we also get thick black and thick white vertical lines (like referee type stripes). any ideas??
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