How do you change the ink cartridge on a epson stylus c40ux

SOURCE: how do i take out the ink cartridge

Hi Kalola, Here is the link to the document files for your printer, the one labeled *Product Information Guide* is the users manual: http://www.epson.com/cgi-bin/Store/support/supDetail.jsp?BV_UseBVCookie=yes&infoType=Doc&oid=14419&prodoid=4742578 Page 6 covers the removal and replacement of cartridges. Let us know if you have any other questions and please don?t forget to rate the posting.

SOURCE: My Epson Stylus NX 400 is not printing.

no it cannot. Those multi-colored cartridge system requires that you put in every single color, AND ensure that they are not empty before they will print. Even if all you want is a black and white copy.

SOURCE: changing an ink cartridge Epson stylus sx105

http://safemanuals.com/user-guide-instructions-owner-manual/EPSON/STYLUS%20SX105-_E

that guide shows how to change the cartridges and no you dont have to wait untill they have run out to change the cartridges

SOURCE: changed black ink cartridge for epson stylus d120 but not working

Usually when this happens the printer fails to goes through the motions of the printing process, kind of stands still with indicator lights just blinking away. This could be as a result of either of these scenarios.
i.                     Ink cartridge has developed incompatibility or is incompatible
The Solution is to try an older/another cartridge (doesn’t matter if ink is finished. You must replace cartridge one at a time). If lights stop blinking it confirms that your cartridge has become incompatible or developed incompatibility. Also if your printer is the type that can work with only one cartridge, remove one after the other (closing back the lid/cover) to determine which in the set (black or color) has become incompatible. At the instance the incompatible one is removed and you close the lid, the blinking will stop (for printers that can print with one ink cartridge only). Just replace the incompatible one and start printing again. In most cases the issue is always with one cartridge. But if both are affected, you have to replace both. Because of this type of problem, always keep used cartridges somewhere safe; they come in handy for this type of troubleshooting.
ii.                   The Cartridge electronic panel  is dirty
The electronic panel on the cartridge that makes contact with the cartridge carrier inside the printer is dirty and needs cleaning.  This electronic panel is front part of the cartridge with copper “dots”.
The Solution is to try to clean this panel with a piece of folded tissue paper soaked in a bit of methylated spirit. Also try to clean the area in the cartridge carrier/holder that makes contact with the cartridge’s electronic panel (Usually this is more difficult). If you cannot reach it with your fingers, use a stick or something with tissue wrapped around it. Allow to dry well and return the cartridges, close the cover. The blinking should stop if the electronic panel is the issue. Once the blinking stops the printer will print.

SOURCE: Epson Stylus SX400 "Ink cartridges cannot be recognized"

Try this: First check which cartridge(s) are not being recognized. In my case where I replaced all three color cartridges, two were recognized right away but one was not. You find out by sending a print request to the printer and looking at the ink cartridge levels diagram in the dialog window. In my case two of three were fine but one had a red X on it. So I removed it and cleaned the contacts with alcohol then rocked it in the slot after pressing it in. It was recognized and the charging process began as normal.