Like many other people I have a vertical line down the copy, using the document feeder, not the plate glass. on my HP officejet J5780 3 in one. Your advice is to clean the small glass plate. I look everywhere to find this small glass plate. Can't see one. Can you supply a picture with an arrow pointing to the small glass plate.

Inspect the glass below the feeder for ink or ink correction liquid remnants from previous scanned documents. Clean them out.

Lift the scanner top, then look at the narrow pane of glass. There probably is a spek of dust or ink on it. Clean it with alcohol. I've had to remove the glass, due to the speck being on the undersaide of the glass.

Also, lift the ADF cover and clan the rollers with a damp cloth.

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Under the Automatic Document Feeder is a small glass.
This glass becomes dirty, creating lines on the page.
open up the scanner cover and clean the glass

Have you tried cleaning the document feeders Scan Glass? (small glass under doc feeder ~ 1" by 9") Most times there is dirt spot on this glass, causing a shadow on scans and copies.
Try copying from the large glass by lifting doc feeder / platen cover and manually placing original. If no line copying or scanning manually from large glass, then small scan glass is deffenitely the culprit. Hope this helps.

clean your scan glass (thin strip of glass running from front to back, underneath document feeder) with a soft cloth and alcohol.

there is probably a dirt spot on the scanner glass where the document feeds in. try cleaning the thin glass under the document feed cover.

If the lines are vertical (in the direction the ADF feeds, 11in long for 8 1/2 by 11) You can try cleaning the glass the scanner uses when it's using the document feeder. Pull up the top left part of the printer where the documents feed, there's a little rib in the middle of the side to help you do this, then simply pull up the assembly underneath with all the rollers in it, you should see about an inch of glass underneath and a centimeter long strip of white plastic on the assembly (this serves as the white background when feeding slimmer papers) Clean them both. I'd recomend any glass cleaner, just don't spray it in there, spray it onto a cloth.

Open up the document feeder. You will probably find wite-out on the scanner glass.

If you lift up the lid on your scanning device you will notice a glass strip about 1 inch thick and then the large area of glass used for flatbed scanning. The 1 inch strip is used for ADF scanning. Because your papper is moving across the glass strip, any dot, smudge or scratch will affect your scanning and cause verticial lines down the page. Sometimes the dot is not visible to the eye. Get some glass cleaner that has alcohol in it and thoroughly clean the glass strip and it should solve your problem. If it turns out to be a scratch on the glass then cleaning won't help.

hi,

I just want to know that which did you try to use to scan. is that by using the ADF (automatic document feeder) or using the scanner glass?