Picture gose blurry after 45 min or so I got this Zenith A50M91W 50 in. Rear Projection Television The pic seems to loose focus after a long set up prosess. It starts with color shifting, the the letters or whatever is white or bright seems to intesify, then the whole pic ends up blurring baddly, and then the proses starts all over.Could someone help me out ? Thanks, Colby

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Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
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