My printer is going through the process, however paper comes out blank. Ink is showing to be full, but I have not used printer in over a year. Could it be the Ink cartridge?

The draw back of inkjet technology printers are, if it is not using quite long period of time,cartridge nozzles will dry up, result printer will act just like a printing some thing but nothing will come on paper(blank page) even ink levels are showing full.
Try to recover the both cartridges through 'clean print cartridge' process from the system,if not better consult cartridge re-filler to clean the nozzles..Replace new cartridges if above said methods are not worked out.

change black head.

Do a couple of Cleaning cycles, that should do it.

Try:

• Certain colors are missing or no ink prints on the paper
• How do I perform a print head cleaning?

You actually answered your own question, you said it started fading and came out with lines missing. Looks like and could possibly be that the ink cartridge you are using wasn't as full as you thought it was, and the computer really has no idea, it's just software and i do not recall seeing sensors on the inside of the ink tank to tell the computer how much ink is in the cartridge. Try refilling the ink again or maybe a better idea is to buy a new cartridge since over time the cartridges can get contaminants in them which will block the ink from the inside of the cartridge.
Hope this helps

factory restore

To solve the printing problem..


# Hold the cartridge upside down, with the bar-code label facing you and take a damp paper towel.
# Use the towel to wipe the printhead of the cartridge on the bottom (where the ink comes out). Wipe the printhead horizontally in one direction only (left to right).
# Continue doing this until it looks clean.
# Then dab the cartridge on the towel to make sure the ink is flowing.
# Next, look inside the printer and locate the carrier that holds ink cartridges. Caution: Make sure the cartridges are not installed at this point.

1. Look for a shiny piece of metal underneath the contacts at the back of the carrier.
2. Take a damp cotton swab (use water only!) and wipe along the bottom of the shiny metal piece. Note: You may need more than one swab.

# Reinstall the cartridges, making sure you snap them correctly into the printer. 


Hope this help. Please Rate My Response! Thanks! 
PREM

If your cartridges have been sitting in the printer for a year, it seems likely they have dried out. Replace them with new cartridges, but make sure you use the proper cartridge replacement procedure so that a ink charging cycle takes place. Then do a nozzle check. Is there any sign of ink on the paper?. Try up to three cleaning cycles. If ink is now flowing, but not yet perfectly, don't carry out any more cleaning cycles. Just leave the printer for 24 hours (to allow any air in the print head to disperse). Then repeat the cleaning cycle/wait process. It may take a while to restore a perfect nozzle check print.

If you have done lots of head cleans with no result, and you're sure you have good ink cartridges properly installed, then you can try soaking the print heads for 24 hours (or more), as follows. Turn the printer on, and as soon as the print head moves pull the power cord out of the back, or turn the printer off at the mains. You may
now carefully move the print head by hand over to the left hand side out of the way. Look inside the print head parking area on the right and you will see a small rubber cup that comes up to cover the print nozzles when the head is parked (to stop it drying out). Use a syringe or dropper to fill this cup with head cleaning fluid or distilled water. DO NOT USE TAP WATER. Carefully push the print head fully into its parking position so that the cup full of fluid comes up over the print head. Leave this for at least 24 hours, then try a head clean/nozzle check again. Try this process twice if necessary. If still nothing, post a new comment detailing what you have done and the results.

Let me know if you find it--my computer and the printer show that my ink cartridges are full, but blank paper comes out when I try to print.

Sounds like maybe the nozzles are clogged up. Try using the printer maintenance utility to "Clean Nozzles". I think for most Lexmark printers it is call the "Lexmark Solution Center" in your Windows Start Menu. If that doesn't work, try maybe wiping the cartridge with a damp paper towel at the place where the ink comes out.