I have Xerox workcentre Pro 635, 645, 657 Model FAX machine. It has an error message which is 'Memory Error' "Press STOP' and Check Phonebook. I was trying to get fax from some one it got this message. I put off the machine still this error never cleared. I tried so many things Still I have the error. I was able to send out FAX's from this machine. But I didn't have the chance to receive any fax info from outside. Could you please answer this question?
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