Printed copy will not feed out line by line and finally will not feed the printed page. How to get it to work properly?

Your printer's rollers sound like they are worn along the paper path. I suggest you taking your printer in to have a maintenance cleaning or have the rollers replaced. This will resolve your issues.

When you say that your all-in-one system will copy, but will not print from the computer, this tells me that there could be a connection problem between the printer and the computer. This is more then likely a driver problem. you will need to go to lexmark and download the latest drivers for your operating system.
But this could also be a broken or loose cable.

Most likely a page was scanned with 'white out' (Liquid Paper), still wet on the page. As the page feeds over the scanner, (a narrow strip of glass that runs across the width of the page along the feed path) the wet liquid paper comes off on the glass as a thin line and dries. Thereafter, when copying, the scanner light does not go through the liquid paper streak and the result when printed is a thin vertical line that runs the full length of the page.

If this is your problem: follow the path that the paper travels when sending a fax or making a copy, until you find the scanner (narrow glass strip). Take a clean, soft cloth and a small amount of methylated spirit (or white spirit) and remove the now dried Liquid Paper from the glass. Clean the whole strip ensuring that the glass is left clean and dry.

1 Select Print Control Program Cartridges Align Cartridges. For help, see page 8.
An alignment page prints and the Align Cartridges dialog box displays on the screen.
A number appears under each pattern. The test page that prints is similar to the one
shown.
2 For each alignment group on the test page, find the number that comes closest to
forming a straight line.
3 In the Align Cartridges dialog box, enter the numbers you selected on the test page.
4 After you have entered a number for all of the patterns, click OK.

http://www.lexmark.com/publications/pdfs/2007/x73/user_guide_en.pdf

My printer did the same thing, after tearing into it, I found one of the plastic gears had broke in two.

you might try enabling bi-directional printer support in printer properties, if its paralell cable then it is in bios, epp or ecp.

Please follow the steps given below to perform a self test on the printer:

1. Switch off the printer.
2. Press and hold down the paper feed button.
3. While keeping the paper feed button depressed, turn the power back on.
4. When the printer starts to print, release the paper feed button.
5. When the first page is printed, switch off the power (otherwise the printer will keep on printing).

Seemes very daft, and sounds like a twit, but not really.

When I recieved the new cartridge I placed it in the correct cartridge retainer in the printer matching up the dark green colour of the cartridge and the top clip, and it printed nothing even after a tryed re-seating it.
So I placed it in the other thinking maybe I somehow might have placed it in the wrong slot, so I placed it in the other (Colour), and set that up as I did the other, and it printed a blurred page but then stopped printing.
After that I then placed it back in the other cartridge retainer, set it up as the previous times when it did not work, and then it worked.

Seems strange and simple, but it did not work the first time at all, and after faffing with it finally did.

This might help someone, and then again might not.

Same problem here. Went thru a few tests with Lexmark but didnt help. They next said it would be best to get new one since repair cost would be higher. Thru front door I do see a spring that moves freely. That must be broke. After their help they sent email for 20% off.

Sounds like there is something jammed in the paper feeder, or maby its the paper feeder itself. Check to see if the path the paper follows through the feeder is completely clear. Sometimes paper is left in the feeder from previous paper jams.