Printer says it needs cleaning,and to see manual.

There are two ways of cleaning the HP 4L's:

1. Purchase laser cleaning sheets.
2. In your user manual there is a section that instructs you to create your own cleaning sheets.

This will clean toner off the transfer roller and the fuser areas. Additional cleaning can be completed with canned air and the specialized cleaning towels also available for purchase. Remove toner cartridge and carefully wipe the interior of any toner or paper debris.

DO NOT USE ORDINARY PAPER OR CLOTH TOWELS!

These can leave debris in the printer and contaminate the transfer roller causing very poor quality prints.

Do you use adhesive labels? It looks like the printer is unable to make the difference betwen the labels. Verify that the printer it's not set on Continuous mode for the media type. Verify if there is any label (or pice of label) stiked on the upper media sensor (gap sensor). You can locate the upper media sensor using the User Manual (page 74). There is an User Manual available for download from Zebra website. You will find there precious information. The manual is very explicit and you will learn how to maintain your printer and how to troubleshoot some common errors. Clean your printer, assure to put the supplies on the right path, close the printhead and press Pause to enter in Ready state.
You can clean the sensor with an coton cloth dampened into isopropylic alcohol.

Here is the link to user manual:
http://www.zebra.com/content/dam/zebra/manuals/en-us/printer/105sl-ug-en.pdf

Have you tried doing a Head Cleaning, this is accessible through the printer options in control panel or through the printer itself (check manual).
Find the manual and setup guide here.
You should also try re-installing the drivers also available in the link provided above.

This might help. I did the same thing with my laserjet printer.
Staples has laserjet cleaning sheets. I ran several sheets through the printer after I pulled most of the transfer paper out.
The sheets are one use sheets so, you will need a few.They are impregnated with cleaning fluid on textured paper.
These sheets clean the entire paper travel path.

Go to www.epson.com. Click on the Support link. Lookup your specific printer model #. A list of all available software/ files and your users manual should appear available for free download. Download your manual and follow the steps in it so that you will not void any warranty. Hope this helps.

Delete all print jobs and turn the printer off. Remove any foreign objects from inside the printer. After a few minutes, turn the printer back on.

Here is the link to Lexmark's website for this printer.

http://www.lexmark.com/publications/pdfs/2007/4200/en.html

Don

Either head need cleaning or the ink is running low.
You have to clean the print head manually. The head is on the ink Cartridge.
Look in your manual for a picture. A picture may also be on your computer instruction on how to change a cartridge.
A cleaning solution is available to clean the head. I get mine when I buy ink to refill.
I hope this help you

yes clean your ink well manually

here is the service manual for your printer

http://www.nodevice.com/manual/newmans/1164257699mp750780smpdf/get13922.html

it has trouble shooting and step by step repair instructions

The manuals are available on Epson's site. Here's a link to the User's Guide: http://files.support.epson.com/htmldocs/cx11nf/cx11nfug/index.htm I verified that the manual includes how to clean the printer. If that doesn't resolve the problem, please let us know so we can troubleshoot further.