I have a problem with our HP3030 in that when I try to photocopy using the document feeder, the pages all come out with a double black line running down the centre of each page. The same problem comes with a printed Fax Sent Sheet. But when I photocopy one sheet only at a time on the Flatbed, the copy is clean and does not have this double black line. Anybody have any idea how to cure this? I suspect it's something to do with the lighted heated thing on the scanner, which has to copy from the Document Feeder, only in the narrow gap under the Feeder where the sheet feeds through, whereas on the Flatbed, the scanner scrolls along the entire page on the flatbed. I think it's screwdriver and investigation time. I used to watch the guy who used to come and service my ancient photocopier. He used to take the heated scanner thing up and just brush off the extra collection of the dried ink which has come as excessive ink from the ink cartridge. I suspect it's probably something like that. Anyone any ideas please? Thank you

Brilliant. I had cleaned the strip of glass with a duster but the line remained on the document fed copies, scanned copies and the Sent Fax sheets.
On closer examination to see if there was a problem underneath the glass I found a tiny blob of dried on sticky/liquid or something on the top of the glass strip, which I
hadn't noticed had not cleaned off with duster. Now removed!!
Completely clean document fed copies and scans. Sorted. Thank you JoeFine48.
By the way, the ToolBox (and presumably CD) Help is useless. It suggests changing the Print Cartridge and on the examples of problems didn't show this one at all, but there is a page in the HP Website Help Section in Business Help where different vertical lines, so many inches from the right hand margin of the page - appear to be shown as demonstrating different problems, So anyone with one or more vertical lines to the right of centre on all printed copies, should look on the HP Help site for some cluies to fix.
Thanks everyone. Brilliant. I had cleaned the strip of glass with a duster but the line remained on the document fed copies, scanned copies and the Sent Fax sheets.
On closer examination to see if there was a problem underneath the glass I found a tiny blob of dried on sticky/liquid or something on the top of the glass strip, which I hadn't noticed had not cleaned off with duster. Now removed!!
Completely clean document fed copies and scans. Sorted. Thank you JoeFine48.
By the way, the ToolBox (and presumably CD) Help is useless. It suggests changing the Print Cartridge and on the examples of problems didn't show this one at all, but there is a page in the HP Website Help Section in Business Help where different vertical lines, so many inches from the right hand margin of the page - appear to be shown as demonstrating different problems, So anyone with one or more vertical lines to the right of centre on all printed copies, should look on the HP Help site for some cluies to fix.
Thanks everyone.

I just started having the same problem last week. So what has to be removed and what exactly has to be cleaned?

Thanks. I just started having the same problem last week. So what has to be removed and what exactly has to be cleaned?

Thanks.