Can't find my printer from my MacBookPro. Canon MX870 connected via ethernet to my Airport Base station

I have a MacBookPro3,1. My Canon MX870 is connected to my Airport base station via ethernet. It was working fine until two days ago. I restarted my computer, the printer and the airport and router. Reinstalled the driver for the printer and even reset the airport. Best I can tell it's something with my MacBook. My girlfriend was over yestrday and she has a newer MacBookPro and I can find my printer fine on her MacBookPro but I can't find it at all on mine. I'm at a complete loss. Any thoughts or insight would be greatly appreciated.

I wonder if one of the “printing” plists has become corrupted. Find your preferences file in the library under your user name. Scroll down to the series of printer plists starting with “com.apple.print“. There are a series of them, even one specifically for the mx 870. You can delete a plist with relative impunity as they are rebuilt when you restart your MBP. I would delete 1st the one that has 870 in the name, put it in the trash, but don’t empty the trash, and restart. If that doesn’t solve the problem you can delete others- like the “print add“ plist or print center plist. Restart after each deletion and see if that solves the problem. You can always drag the deleted plists out of the trash and put them back where they came from as long as you don’t empty the trash.
Good Luck!

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First of all, the driver for the Deskjet 6940 is built into the Mac OS. You really didn't need to download extra stuff from www.hp.com (sorry about the bad advice).
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+ Click the White Kudos star on the left as a way to say "thank you" for helpful posts.

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Go to Solution.

Hi Foondude,
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Can't find my printer from my MacBookPro. Canon MX870 connected via ethernet to my Airport Base station

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