Welcome to Justanswer.com, my name is ***** ***** I will do my best to assist you.
Can you try deleting the faxes from your machines memory, and once thats complete attempt to receive a fax again. It should work.
Here is how to delete the faxes in your machines memory.
The section we want is titled "Checking/Deleting Received Fax Documents"
Whether or not this solves the issue, or if you run into any issues completing these steps please send a reply and let me know what happens.
Dustin S.Senior Technician and Network Switching Systems Operator / Maintainer.