-Check to see if the printer diver is fully installed or installed correctlly
-Check paper and size setup to see if the size of the paper that you choose is suppoted o not.
-check your print setup
Under Mac OS X 10.6.2, with the latest HP software installed, I cannot open the scanner on my HP...
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Under Mac OS X 10.6.2, with the latest HP software installed, I cannot open the scanner on my HP Photosmart 3310. I get the message "failed to open a session on the device. I have deleted and re-installed the print queue several times.