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How do I know if print head went bad and can you remove and clean? 
Even though this is a wireless printer, can I just leave the usb cable attached and by pass setting up a wireless system? 
I have reinstalled my Pixma MP620.  Am able to do a;; the maintanance checks etc but cannot print my document from Microsoft Works.  Have checked the USB connection. shut the machine off, ink levels are all lit red and full.  What else can I check?  ...
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