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Check and replace the back-light inverter board. If you wish to get more details, check the site linked here. Surf the site in "MOSAIC" view. It will make surf easy. http://electronicshelponline.blogspot.com/
Viewfinder has focus lever at bottom, please adjust viewfinder internal focus as per your eye sight looking on-screen display. Every thing will be fine after that.
Do you have any kind of download accelerators installed? These will compress online multimedia content, degrading the quality and clarity of the picture.
1) Ask what the part location on the board is = IC301 for example..
2) Provide service #
3) Could be LA7612N
4) If they were not blowing smoke,why didn't they give you a
six digit RCA part # ??
one of the possible cause of the said problem can be a defective or broken flex ribbion cable carrying signal to the focus motor. the replacement of the flex will solve the problem.
othe may be friction in the focus assembly. cleaning of the same will do the job.
but in both the cases you will need the help of repair shop.
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