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Hi there For troubleshooting purposes, Perform the following:
1. Open the printer and remove all ink tanks.
2. Insert a single ink tank in the printer then close the cover.
3. Confirm whether the printer recognizes the installed tank properly. If it does, it will indicate it does not detect the other ink tanks, as they are not currently installed in the printer.
4. Repeat steps 1-3 with another ink tank.
5. If the printer at any time indicates two of the same ink tanks are installed, the cause will be the last tank installed. For example, if you inserted an ink tank earlier, and you later inserted another ink tank, and it said two of the same inks were installed, the cause of the issue is the last ink tank.
Please come 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
Ok my printer is giving me the U140 message saying that ink tank cannot be recognized. The new ink tank is Cannon (not a off brand or refill). i think it is a problem with the chip reader port inside the printer not the ink tank chip. I feel this way because if you switch around the yellow and black 8 tanks, the printer accepts them without error.. soo if it was the ink cartridge i could be able to swap the black with the magenta and it should read it.
I had the same problem. My mp630 is also only 4 months old. I replaced all colour ink cartrdiges(inc black), but was only able to release the function for detecting the ink levels for magenta and cyan. Yellow and black then started giving error message U043, with them alternating between working, but never working at the same time. Getting them all clicked in with the lights glowing red does not solve the problem, as once the printer cover is closed, the same error message turns up. The only thing that worked for me is moving the chip slightly out of alignment, by pushing the sliding chip holder, and I only had to do this twice before they all started working and the printer was unlocked.
I've tried everything, it still says the following tank cannot be recognized... it's the pink cartridge...I only want to print in black and it won't work if any color cartridge is empty...this is ridiculous! PLC Help!
carefully remove the tanks from the print head cartridge. use a q-tip lightly soaked in isopropyl alcohol, or use a q-tip paired with an alcohol prep pad from a first aid kit.
gently rub the rubber seating areas for each tank, removing the dried ink from the rubber seat. swab the soaked q-tip, or use the q-tip to gently press the alcohol prep pad into the rubber stopper. use a different spot on the q-tip or pad for each one.
check the print head for ink stains on the black plastic, clean those as well.
Use canned air to dry the stoppers, replace the tanks, and check status. Print a test page and check results.
If you do not print many items, you can avoid the situation by printing a test page every once in a while to keep the contacts clear. Also, run the program to clean the print heads occasionally, and always turn the printer power off at the printer (that seats the tanks down on the stopper, helping to prevent the contact getting plugged by dry ink.