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I just received 2 copiers , A Mx-m 464 and it keeps popping up with " An extra memory module is not installed."
and a Mx-m 465 that has F1-21 . Help please .
does the mx-m464n have a fax option added on? sometime fax options include ram that is easy to overlook when installing. The f1-21 code is a finisher fan trouble code i suggest updating firmware for the finisher to see if that corrects the issue.
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