Need to refill ink cartridges

Turn the printer on.
Lift the cover to expose the print-head mechanism.
The print-heads will slide to a position from where you can "unlock" the ink-cartridge from its holder, and then gently remove the empty(???) ink-cartridge.
Insert a new ink-cartridge (or refill the empty cartridge).
Close the lid.
Print a "test" page.

Turn the printer on.
Lift the lid that covers the print-head mechanism.
Wait for the print-head to slide to the position at which the ink-cartridge(s) can be removed.
Press down on the ink-cartridge, to "unlock" it from the print-head.
Gently remove it.
Insert a new/refilled ink-cartridge, and "lock" it into place.
Print a "test" page.

1) Looking at the front of the printer/scanner there is an indent on the left hand.

2) Lifting up on this portion should reveal the inside of the printer.

DO NOT touch the flat cable inside the printer, DO NOT force the lid, it should open easily.

3) The ink cartridge is underneath the plastic cover in the back right-hand side of the printer. Gently pull up on the cover until it swings open.

4) pinch the clips holding the ink cartridge in the printer and pull up.

5) Unpack the new ink cartridge.

6) Remove the tape that is on the ink cartridge.

(If you forget this step the printer won't print. If that happens, remove the new cartridge, remove the tape and then reinsert the cartridge)

7) Insert the ink cartridge and push gently until it clicks into place.

8) Close the cover over the ink cartridges, and then close the printer cover.

9) Follow any direction on the front display (hit OK)

Here's how to change your cartridges: 1 Make sure the printer is on. 2 Lift the scanner unit. The print cartridge carrier moves and stops at the loading position, unless the printer is busy.

3 Press down on the cartridge carrier latch to raise the cartridge carrier lid.

4 Remove the used print cartridge. Note: If you are removing both cartridges, repeat step 3 and step 4 for the second cartridge.

Sometimes the ink cartridge carrier won't automatically move to its loading position even when the printer is on and the cover is open. Follow the steps below:

1. Unplug the printer from the power source.

2. With the cover open, hold the solid white strip that connects from the carrier assembly to the ink cartridge carrier and gently slide the cartridge carrier to the center of the printer.

3. Remove the used cartridges.

4. Load the new cartridges. Close the cover.

5. Plug the printer back to the power source.

You may also refer to this link: How to Set Up the Lexmark X3600 or X4600 Series All-In-One

Make sure that the printer is on. The power light should be on, but not flashing. Open the printer cover. Press the maintenance button. The print head moves to the black or color ink cartridge replacement position, the power light begins to flash, and the error light begins to flash or remains on. When both cartridges are out of ink, the print head moves to the black ink cartridge replacement position first. After replacing the black cartridge, press the maintenance button again to switch to the color cartridge replacement position. Lift up the ink cartridge clamp as far as it will go. The cartridge rises partly out of the cartridge holder. Lift the cartridge out of the printer and dispose of it properly. Do not take the used cartridge apart or try to refill it. Remove the new ink cartridge from its protective bag. Next, remove only the yellow tape seal from the cartridge. Do not touch the green IC chip on the side of the cartridge. Place the ink cartridge into the ink cartridge holder, and then close the ink cartridge clamps. Do not apply excessive force to the cartridge. Close the printer cover. Press the maintenance button. The printer moves the print head and begins charging the ink delivery system. This process takes about thirty seconds to complete. When the ink charging process is finished, the printer returns the print head to its home position, the power light stops flashing and remains on, and the error light goes out. If you feel that my answer helped you then please give a vote for my answer.

Starts on page 23. http://files.support.epson.com/pdf/nx125_/nx125_qr.pdf
Replacing Ink Cartridges Make sure you have a new ink cartridge before you begin. You must install new cartridges immediately after removing the old ones. Caution: Do not open ink cartridge packages until you are ready to install the ink. Cartridges are vacuum packed to maintain reliability. Note: Leave the expended cartridge installed until you have obtained a replacement, or the ink remaining in the print head nozzles may dry out. 1. Turn on your printer. 2. If an ink cartridge is expended, the error and ink lights on the control panel stay on. 3. Open the document cover, then open the ink cover. Caution: Do not remove the ink cartridge guard or you may damage the printer.24 Maintaining Your Printer 4. Press the y Stop button. If a cartridge is low or expended, the print head moves that cartridge to the replacement position to indicate that it should be replaced. The P Power light starts flashing. If two or more ink cartridges are expended, the expended cartridge at the far left moves to the replacement position. The P Power light starts flashing. If no cartridges are low or expended, the print head does not move. Note: Do not hold the y Stop button for more than three seconds, or the printer may start cleaning the print head. 5. Squeeze the tab on the cartridge and lift it up. Dispose of it carefully. Do not take the used cartridge apart or try to refill it. Warning: If ink gets on your hands, wash them thoroughly with soap and water. If ink gets into your eyes, flush them immediately with water. Keep ink cartridges out of the reach of children.Replacing Ink Cartridges 25 6. Before you open the new cartridge package, shake it gently four or five times. Then remove the cartridge from the package. Caution: Do not touch the green chip on the front of the cartridge. This can damage the ink cartridge. 7. Remove the yellow tape from the bottom of the ink cartridge. Caution: Do not remove any other labels or seals, or ink may leak. 8. Insert the new ink cartridge into the holder and push it down until it clicks into place. 9. Press the y Stop button. If another cartridge is low or expended, it moves to the replacement position. Repeat steps 5 through 8 to replace any other cartridges that need to be replaced. When you press the y Stop button and no other cartridges need to be replaced, the print head moves to its home position and the printer starts priming the ink. This takes about 1 1/2 minutes.26 Maintaining Your Printer When the P Power light stops flashing and the error and ink lights go out, ink charging is finished. 10. Close the ink cover, then close the document cover. Caution: Never turn off the your Epson printer while ink is charging or you'll waste ink. If the error and ink lights remain on after the print head moves into its home position, an ink cartridge may not be installed properly. Press the y Stop button again, and then press the ink cartridge down securely. Note: If you replaced a cartridge while copying a document or photo, cancel printing and make sure your original is still placed correctly on the document table. Then copy your original again. If you remove a low or expended ink cartridge, you cannot reinstall and use the cartridge.

1. With the ink cartridge holder in the ink cartridge replacement position, lift the lids on the cartridges but do not take them out.
   
   
   • If the cartridge holder is not in the ink cartridge replacement position, press and hold the Maintenance/ ink cartridge replacement/ cleaning button (depending on your printer model) until the holder moves out.
2. Check the yellow tag/flap has been removed from the top of the cartridges.
3. Push down firmly on each cartridge to make sure it is clicked into place.
4. Close the lids down gently but firmly so they click into place. Be careful not to touch the cartridge sensor.
5. Press the Maintenance/ ink cartridge replacement/ cleaning button on the panel to move the carriage back to the right hand side and start the ink charging process.
   
   
   • This process takes about one and a half minutes to complete.
   • When ink charging is finished, the print head returns to its home position on the far right, under the plastic casing. The power light stops flashing and remains on, and the error light goes out.
   
   
6. If the error light flashes after the print head returns to the home position, the ink cartridge may not be installed properly.
   
   
   
   
   
7. If the red light is no longer displayed, but Status Monitor still reports a Non-Genuine Ink warning when the cartridges are genuine, perform a full uninstall and reinstall of the printer driver, using the latest driver from the Drivers & Software section of the Epson Support website. For help with this step, see one of the following Related Articles:
   
   
   
   • Mac OS X: See How to uninstall a printer driver from Mac OS X
   • Windows 98SE and ME: See How to fully uninstall a USB printer on Windows 98 and ME
   • Windows 2000 and XP: See How to fully uninstall an All-In-One from Windows 2000 / XP
   • Windows Vista: See How to fully uninstall a USB All-In-One from Windows Vista
   
   
   
   
   
   
8. If the red light is still on the printer, and Status Monitor indicates that an ink cartridge is not recognised, follow the steps below:
   
   
   1. Power the printer OFF.
   2. Disconnect the power lead for 60 seconds.
   3. Reconnect the power lead. Do not power the printer on yet.
   4. Perform a printer operation check.
9. 
   

To replace an ink cartridge using the ink button, follow the steps below.
1. Make sure that the printer is on. The power light should be on, but not flashing.
2. Lower the output tray, then open the printer cover.
3. Press the ink button. The print head moves to the ink cartridge replacement position, the power light begins to flash, and the ink out light corresponding to the ink cartridge that needs to be replaced begins to flash or remains on.
4. Open the cartridge cover. Pinch the sides of the ink cartridge that you want to replace. Lift the cartridge out of the printer and dispose of it properly. Do not take the used cartridge apart or try to refill it.
5.Remove the new ink cartridge from its protective bag. Place the ink cartridge vertically into the cartridge holder. Then, push the ink cartridge down until it clicks into place. Do not apply excessive force to the cartridge.
6. When you are finished replacing the cartridge, close the cartridge cover and the printer cover.
7. Press the ink button. The printer moves the print head and begins charging the ink delivery system. The ink lights start flashing. This process takes about one minute to complete. When the ink charging process is finished, the printer returns the print head to its home position. The power light will stop flashing and remain on, and the ink out light will turn off. The power light will continue to flash while the printer is charging ink. Never turn off the printer while this light is flashing.

Sounds like your black cartridge has a clogged print head. If you bought a refill from a store or on-line you should take it back and either have them clean it (if they know how) or return it. If you refilled this yourself at home this is a problem that occurs when you let your cartridge dry out before you refill it. You can try and rehydrate the print head by placing it on a warm moist paper towel until you see ink soaking into the towel (ink stains most surfaces so be careful where you do this). Otherwise, I recommend Cartridge World for refills because they go through cleaning and print testing steps to make sure this doesn't happen.

Sounds like the TSR is out on your cartridge. The TSR is the heat sensor for your print head. If the TSR goes out it cannot tell the printer that the temp at the print head is at ok levels. So the printer assumes the print head is really hot and at risk of fusing its nozzles so it prints really slow (the faster the printing the hotter the print head gets). It is possible, but not very likely, that the ink in the cartridge is of such low quality that it is not cooling the print head properly as it flows through the nozzles. Thus the TSR tells the printer to print really slow so you don't burn up nozzles. If you got this cartridge refilled at a store or on-line I would return it and get your money back. I recommend Cartridge World for refills because if this happens to one of their refills they will give you a new refill at no charge.