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H P DeskJet 840C?

how do I start to find the problem,then fix my printer?
SHELLEY, November 2006
Check connections (usb or parallel) - check power.
Always worth power cycling.
Try a test page - just hold the power button on for a second - if this doesn't work, then hold the power button as your plug in the power - it should print a test page.
If this all works - then try reinstalling the printer driver.

Mark, December 2006