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Its not drivers issue, hard ware issue.. Scanner assm faulty,replace it..For tech guys:Open flat bed glass, remove scanner assm clean inside reflector glass with ear buds & adf glass especially at home position.. lubricate on rail refix it back.. check it..
Step1: Open flat bed galss & optical scanner assm, clean flat bed glass, as well as clean internal reflecting glasses in optical scanner, ensure that don't use any kind of cleaners to clean the reflecting glasses, use ear buds to clean gently..Step 2: Replace optical scanner assembly..
1. Too much friction while moving the optical scanner unit.. Open the flat bed scanner lubricate the rail 2. Optical scanner unit faulty,remove the scanner unit open it gently, clean mirrors in side the unit with ear buds re-fix & clean the flat bed mirror neatly especially at home position.. re-fix as it is then check..I suggested this activity for only tec guys..