Question about Canon PIXMA MP830 All-In-One InkJet Printer

6 Answers

UO71 More than one ink tank of the follwoing color is installed/U140 The following ink tank cannot be recognized

Please help! Our MP830 was new about 4 months ago and we have now changed all the ink tanks at different stages as they ran out. We are using Canon refills but the yellow tank comes up with either the UO71 or the U140 message. It very occasionally works but these times are few and far between. Any ideas? Many thanks.

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  • kate3232 Oct 04, 2007

    I ended up changing the dodgy cartridge and it is now working fine.

  • 030366 Nov 29, 2007

    I had the same trouble. I was receiving either a "More than one ink tank of the following color is installed" or an "Ink Tank can
    not be recognized" message, for the same cartridge. Both problems were solved immediately by replacing the ink
    cartridge. I also found the same solution by searching Canon's product page for the MP830 online.

  • shagra Dec 29, 2007

    I have had the same problem where the alarm is on and it specifies that more than 1 ink tank is installed / U140. I took the cartridge out and cleaned the chip and it's working, but I don't know if it will continue to . It's only been a problem since I changed the first lot of ink, so if it won't work again I will get the ink tank replaced (I have the dockets!)

  • Anonymous Jan 06, 2009

    I have the same problems: ERROR U071 more than one ink tank of the following color is installed.....i heard about some UNIVERSAL CHIPS that can working with no problems...
    Please help

  • Anonymous Feb 03, 2009

    This is great. If you clean the chip at the front of the tank, it usually will work. Or at least it will work for a few prints until it displays UO71/UO140; just routinely clean the computer chip. Hope this helps! (when your taking German and your papers don't print, you forget stuff).

  • kennyhendric May 08, 2009

    Corporations sold us all this **** (if we QUIT working for them and TRIED I'm sure we all could do better at making ****)...and now they apparently have bought our government so we'll all probably be getting more of this **** (but crappier) in the future....Capitalism blows~! Of course we're not going to get better products when the products are fueled by profit....next year, if they allowed me to vote, I think I'd vote socialist (it just CAN'T be any worse than this form of plutocratic government).

    phew....glad I got that off of my damn chest~!!

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6 Answers

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Had the same error after replacing my black ink om my MP830.(UO71) I Put some Methylated Spirits on a cotton tip and gently cleaned the cartridge chip (allow it to air dry). This fixed my problem!

Posted on Dec 05, 2007

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I'm having the same problem and its not the cartridge. I've replaced several and I'm still having problems. Piece of junk.

Posted on Jul 22, 2008

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Ah, so it is the cartridge, I didn't want to waste one by replacing it and finding it was still stuffed. Thanks for that, looks like I'll have to get a new cartridge!

Posted on Dec 22, 2007

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My wife sorted this one for me. The black cartridge flashed and the UO71 error message appeared. She found that one of the other cartridges (Magenta) also had a black chip! In fact, the magenta cartridge was also flashing. After replacing the magenta chip, everything was fine again. In this context, I guess that the apparently nonsensical error message was correct: there were two cartridges (well chips, at least) of the same colour. 

Posted on Jan 18, 2009

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I had replaced my 830 and intended to discard it after two black ink tanks would no longer be recognized after repeated tattempts. I tried a third and it has been recognized. Canon's quality control must be almost nonexiatant because the odds againts two defective tanks from randoms sources at random should be in excess of a sixty character pass word. D.D.

Posted on Jul 24, 2008

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I replaced the flashing ink cartridge with a new one and it's been fine ever since. Keep your dockets and if there is a problem tell the store to send it back to Canon. Mine did and we're cruising!

Posted on Jan 20, 2008

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Posted on Jan 02, 2017

SOURCE: UO71 More than one ink tank of the follwoing color is installed/U140 The following ink tank cannot be recognized

Do not buy a Cannon again, they ****! this is my last one it is a i6600P

Posted on Aug 27, 2008

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You need to clean your waste ink i think. For troubleshooting purposes, please perform the following:
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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
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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

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