Question about HP LaserJet 9500n Printer

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Error code 57.70 on HP 9500 color printer

This is a duplexer fan error code but our machine does not have a duplexer fan installed. What could cause this problem with no duplexer fan? The machine worked fine until this code now it just says to cycle power and you get the same code.

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What is the code? This unit does not have a fan in the duplexer nor for the duplexer. The 9500 has a fan housing but there was never a fan put in by the design team. Give the code and I look it up to see the problem.

Posted on Apr 30, 2010

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If the duplexer prints the back side upside down in Vista once it is enabled you can get a patch as described here.

Regards,
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