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Check your flat bed and Document feeder scanning glass need to be clean, if any dot or dust in scanning glass of document feeder it will appear a line, check this points first 1- Check printouts from computer or FAX if it is clean problem in scanning section 2- Check using Copying a blank paper using only Flatbed if it prints without any line its problem from document feeder Scanning glass So solution is clean the Document feeder scanning glass using wet cloth, note careful about wet cloth switch off the machine and clean it
There is most likely something on your scan glass that is blocking the scanner. Clean of both pieces of glass that are there when you flip open the ADF, or top cover. Try to copy again. If it is still there then there is either something on the scanner piece that moves back and forth to scan or one of your scan LEDs is burnt out and the scanner will have to be replaced.
clean the print heads and run clean cartridge utility from printer properties window.after that
disconnect the power and usb cable from the back of the printer and press and hold down the
power button for 30 sec and then reconnect the cables and try again...open the backdoor and
try to move the rollers in upward direction.
Not sure what you have tried but if there are no lines when printing but there when scanning there is something on the scanner. Could be something as small a single dot of dirt and it will put a line down the whole page. Try cleaning the glass.
If the line only appears when the scanner is used & not when printing directly from the computer, you are correct in assuming the problem lies in the scanner assy. There should be mirrors attached to the scanner assy which will gather dust and cause copy/scan problems. Remove the glass & clean the mirrors with a DRY cotton cloth. Do not use any cleaning solution on the mirrors as they are sometimes treated & can be ruined if they come in contact with a cleaning solution. Use the dry cloth to wipe off the lens while you have it apart.Also clean both sides of the copy glass while you have it off. Reinstall glass & test.Cleaning the optics solves the problem most of the time. Good Luck!!