I too replaced the ink cartridges on my MX700 & had error message

The error E-91 on an Epson Stylus RX 520 indicates a communication problem between the printer and the cartridge. Here are some steps you can try to resolve the issue:

1. Turn off the printer and unplug it from the power source.
2. Remove all the ink cartridges and check for any damage or leaks. Replace any damaged or leaking cartridges.
3. Clean the metal contacts on the ink cartridges and inside the printer with a soft, lint-free cloth. Make sure they are completely dry before reinserting the cartridges.
4. Reinstall the ink cartridges and make sure they are properly seated.
5. Turn on the printer and see if the error message still appears.

If the error message persists, try resetting the printer by following these steps:

1. Turn off the printer and unplug it from the power source.
2. Hold down the "Stop" and "B&W" buttons while plugging in the power cord.
3. Keep holding the buttons until the printer starts to initialize.
4. Release the buttons and wait for the printer to finish initializing.
5. Try printing again to see if the error message is resolved.

If none of these steps work, there may be a hardware issue with the printer and it may need to be serviced by a professional technician.

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1 Turn on the Canon MX700 printer by pressing and holding down the "Power" button. Open the paper output tray by pulling up on the tray. An arm will unfold from inside the printer and hold the tray open.

2 Apply pressure on the ink cartridge tab and remove the ink cartridge. A flashing light on the outside of the ink tray will indicate what cartridge needs to be replaced.

3 Remove the film, orange tape and protective cap from the replacement cartridge. You can throw away any trash. Do not touch the metal contacts on the new cartridge; this may cause the cartridge not to work.

4 Insert the front end of the replacement cartridge into the ink holder. Make sure you are placing the correct color in the correct spot. There is a sticker on the outside of the holder indicating what color goes where.

5 Apply pressure on the cartridge where it says "Push" until the cartridge snaps into place. The once flashing light should turn a solid red indicating the cartridge was replaced correctly.

6 Close the paper output tray. The Canon MX700 will start cleaning the printer heads. You cannot print during this time. The entire process may take a minute or two.

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Thanks

Hi there
Try the following steps to remove HP Printer Error Code 0xc18a0001.
I have put 3 ways for you to try.

1. Without turning off the printer, unplug the USB cable.
2. Remove the cartridges.
3. Wait until the message "Insert cartridge" appears.
4. Unplug the power cord.
5. Wait 60 seconds.
6. Reconnect the power cable. If the printer does not turn on automatically, press "On button".
7. Reinsert the cartridges and close the lid.
8. If the printer has a page of calibration accept.
9. Reconnect the USB cable and remake an impression.
10. If the problem persists, the machine must be repaired.

Or try 2

Turn the printer and wait until you receive the error message.
* Simultaneously press the keys "9" and "#" printer.
* While holding the button down, unplug the power cord from the unit.
* Wait a few seconds.
* Still holding the button down, reconnect the cable and turn on the printer.
* Release the buttons.

Or try 3

* Turn the printer and wait until you receive the error message.
* Simultaneously press the keys "9" and "#" printer.
* While holding the button down, unplug the power cord from the unit.
* Wait a few seconds.
* Still holding the button down, reconnect the cable and turn on the printer.
* Release the buttons.

Please all I ask is call back and just gave a vote, it will gave me some satisfaction to know am helping some one, so I will keep on helping.
All The Best: Pineworks

You can try holding the resume button (triangle in circle) for about 10 seconds. You need to do that for each cartridge that you have refilled, so the printer will recognize them again.

Firstly I suspect you are not using genuine cartridge or you have refilled the cartridge.
To fix this you need to disable the ink checking procedure.

Do you know that low ink or ink has run out message appears once cartridge empty. If you want to use refill ink in that cartridge then you need to deactivate ink level to get your printer run as usual. Check the following tips to fix low ink error message in case of refill ink usage. Below some methods to deactivate ink level detection function for some models due to its similarity.
METHOD I:
Press RESUME/CANCEL button once

Related models:
BJC series: bjc3000,8200,etcS series: s400,600,800,6300,9000etc
i Series: i255,320,350,355,450,470d,550,560,850,950,6100,6500,9100,etc
Pixma series: ip1000,1200,1300,1500,1600,1700,2000,2200,3000,4000,etc
METHOD II:
Hold down RESUME/CANCEL button for 5 seconds or more

Related models:
Latest models of Pixma series: ip1880,1980,3300,3500,4200,4500,5200,6700d,pro9000,9500,ix4000,5000,etc

METHOD III:
Press START button once, select COLOR button for colour cartridge; BLACK button for black cartridge

Applicable models:
Pixma MP150,160,170,180,450,460,475,etc


METHOD IV:
Hold down STOP/RESET button for 5 seconds or more

Applicable models:
Latest models of Pixma MP/MX series: MP145,228,245,520,800,850,970,MX308,318,7600,et

I just came up with the same problem. But if you keep pressing the right most button (the red one) for 5 seconds the message "replace ink cartridge" disappears and then you can use it as a scanner.

Error message: No color or black ink cartridge-->Press the Color Copy button to install a new ink cartridge.
Solution: The indicated ink cartridge is not installed. Please install the necessary cartridge(s).

Error message: Color or black ink out -- >Press the Color Copy button to begin replacing the ink cartridge.
Solution: The indicated ink cartridge is out of ink. You will need to replace the necessary ink cartridge(s).


Error Message: Ink cartridge error -- > Press the Color Copy button to begin replacing the ink cartridge.
Solution: There is something wrong with the ink cartridge. Make sure the cartridge is genuine Epson ink. Also, try reseating the cartridge (remove it, and then reinstall it).

Error Message: Paper jam or misfeed -- > Press the Color Copy button and clear the paper jam by hand if necessary.
Solution: Paper is jammed. Check for any obstructions under the unit's cover, and in the paper tray.

Error Message: Paper out -- > Load paper in the sheet feeder and press the Color Copy button.
Solution: Load paper in the sheet feeder, and then press the Color Copy button to continue printing.

Error Message: Scanner unit open -- > close the scanner unit
Solution: Carefully close the scanner and press it down until it clicks securely into place.

Error Message: Scanner error -- > See your documentation and call service if necessary.
Solution: Press the ON button to turn off the Epson Stylus CX3200. Unlock the transportation lock, if necessary. If it is already unlocked, toggle the lock back and forth, 5-10 times. Turn on your Stylus CX3200 again.


Error Message: Printer error -- > See your documentation and call service if necessary.
Solution: Press the ON button to turn off the Epson Stylus CX3200. Disconnect it from power, and then reconnect it to power. Press the ON button to turn on the Stylus CX3200

Try the following reset:

Hold the OK and the Help button at the same time. While holding them down, plugthe power in. Continue to hold both buttons until the unit shut off.
After shutting down, release both buttons and power on the printer.

Alternatively follow instructions on this document from HP.

Turn the printer off.
Hold down the Stop, B&W, and the Color buttons.
Press the ON button.
The LCD screen should flash 3 times.
Release the Stop, B&W and Color buttons
Press the Color button again. 
Then turn the printer off and back on.