HP6940 power interupted...now prints lots of boxes across printed page

HPDeskjet 6940
I've owned 3 of these and love the printer but think I just scrambled the printer's motherboard!?
i was printing a 3 page Word document when i accidentally disconnected the cord between the printer and the pc. I immediately reconnected the cord.
now no mater what type of document [Word / Publisher / Excel / anything !!!] it prints the page contents but it also is printing these black boxes randomly and many of them all around on the page.
It's as if when i plugged it back in I scrambled its brain! It's out of warranty by far and other than it wanting to print these many multisized boxes all around on the page it works fine otherwise so I hate to replace it when maybe if I could no a more thorough uninstall. I've uninstalled and reinstalled 3 times and the problem remains. so I cannot use anything it prints. Is there a way to completely "reset" the entire device to remove the "corrupted file that is causing this to occur in the printer????
[Personal Information Removed]

Hi monkplayer,
It looks like your problem is solved? There wasn't a problem with the printer itself, just the printer settings on your Mac?
This is good information though. We don't always have detailed solutions for customers that are using Safari, since it is hard to write instructions for the general public with specific steps for each operating system.
Best of luck,
Mary
{I work on HP's behalf}

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Welcome to the HP Forums.
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HP6940 power interupted...now prints lots of boxes across printed page

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