Says cover open but its not

It won't recognise the black cartridge in the printer and may even throw an error code. Use the black and white option setting for printing.

Hello Garthplunket,
I will provide you a HP document where you will find the steps to change the ink catridges.  This document also have the detailed information like:
Print cartridge part numbers Replacing the ink cartridges Calibrating the print cartridges Calibrating the print cartridges using the Toolbox Checking the ink level


Here is the link:

http://h10025.www1.hp.com/ewfrf/wc/document?docname=bpd09327&cc=us&dlc=en&lc=en&jumpid=reg_R1002_USEN

Follow the steps to change Epson printer Ink Cartridge:

1. Turn on the printer
2. Open the printer's top cover
3. Wait for the print head to stop at the replacement position
4. Open the cartridge cover
5. Squeeze the tab on the back of the cartridge

Read more steps to change Epson printer ink cartridge issue.

Hello Doca,

Please visit the link provided below to replace the cartridge :

http://files.support.epson.com/pdf/nx400_/nx400_qr.pdf

What is the version of your ink cartridge? It could be that it's not seated properly in the cartridge carrier. Open the printer cover and remove the cartridges. Close the cover. Unplug and replug the printer into the power outlet in the wall to reset it. When the printer turns on, open the printer cover and reinsert one cartridge first. Close the cover. If no error, open the printer cover and reinsert the other cartridge. Replace whichever cartridge is causing the error to appear. You could also try to insert a different known working cartridge to determine if the other is faulty.

this like your cartridge has problem with connection
open printer cover/door
then disconnect your printer cartridge, both the color and black, then connect the cartridge again
close the printer cover/door
try to print again, if message still appear, it mean you need to change your cartridge with new one

Print cartridge
When the print cartridge contacts are dirty and the printer cannot detect/communicate with print cartridge.
Clean the contact points on the cartridges with a dry, lint-free cloth.
1. Open the top cover of the printer.
2. Remove the print cartridges.
3. Clean the copper-colored contact points on the cartridges with a damp, lint-free cloth. Use a dry, lint-free cloth to remove moisture from the contacts.
5. Insert the cartridges back into the printer.
6. Close the top cover.
7. Try printing again.
If you still cant communicate try with new cartridge .

Hi,

Try the following steps and check if it resolves the above error.

1. Disconnect the Universal Serial Bus (USB) cable from the back of the product, but leave the product turned on.
2. Open the cover of the product and remove the print cartridges.
3. Close the cover and wait for the Insert Ink Cartridges message to display.
4. Disconnect the power cord from the back of the product and the wall socket, then wait for one minute.
5. Reconnect the power cord. If the product does not automatically turn on, press the Power button.
6. Open the cover and reinsert the print cartridges.
7. Close the cover. If prompted, print a calibration page.
8. Print a Self Test to verify product is functional.
9. Reconnect the USB cable, and try to print from the computer.

Wish

Here is the procedure to change the ink cartridge

• First Press the POWER button to turn on the printer.

• Open the top cover.The cradle moves to the center of the printer.Open the cradle latch.

• Slide the print cartridge out of the print cartridge cradle and discard it.

• Remove the replacement print cartridge from its packaging and carefully remove the plastic tape. Hold the print cartridge so that the copper strip is on the bottom
  

• Slide the print cartridge firmly into the cradle. Ensure that the copper contacts the print cartridge meet the copper contacts of the print cartridge cradle

• Close the cradle latch.

• Verify white paper is loaded in the printer, then close the top cover. The printer automatically prints a calibration page for optimum print quality.

good luck:-)

I had a problem with one of my Epson ink cartriges and called the company and they replaced it for free. Also many companies that sell knock off ink cartridges now have fixed the problem and now they are recognized by the printer.