My iMac has stopped connecting to my HP all-in-one scanner

Several weeks ago I attempted to use my scanner that had been working fine on the installed Mac software but my Mac would not connect. The HP C5180 all-in-one works fine on print but not scan. I hooked up the HP to my laptop and all functions correctly. I installed the HP Mac software on my iMac successfully but again, no scanner. Any advice?

Shame. Are you connected via a cable or wifi?
Some others on here have often reported problems when using the HP software that comes with the printer/scanner and recommend completely uninstalling that using the HP Uninstaller and simply use the HP software that is installed on the Mac. Latest version here: HP Printer Drivers v.2.6 for Mac OS X v10.6
If that fails you could try 'resetting the printing system' - just possible it might clear up whatever is upsetting the scanning side.
System Prefs>Print & Fax, Control+Click or Right+Click on the printer and select reset printing system. It'll delete all your printers and they'll need to be added again.

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Maybe this???
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http://support.apple.com/kb/HT1341?viewlocale=en_US
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http://www.macosxhints.com/article.php?story=20031215144430486
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http://support.apple.com/kb/ht1341
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Subject:
Subject:
My print feature in safari on my I pad has stopped connecting to my printer. Everything else connects no problem

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http://support.apple.com/kb/ht4356
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My iMac has stopped connecting to my HP all-in-one scanner

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