crwdns2934241:0crwdne2934241:0 dwanderson416

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What does 2 question marks on my display mean?

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I am trying to print from my ProBook 6460b to my HP Photosmart 2575 All in One.  My display panel shows what appears to be two question marks.  When I try to print it says there is an error but doesn't specify what the error might be.  I cannot print.

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HP PhotoSmart 2575 All-in-One Printer

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open