We have two customers, both with a HP M551 that is getting an odd squealing noise from the upper left part of the machine. When you go in and run the individual motors, the noise never comes up. We've tried a fuser, cyan image unit and HV board. We also took one of the printers out of the building and brought it to our office to see if we were getting bad electricity.
None of the above troubleshooting worked. Any ideas?
None of the above troubleshooting worked. Any ideas?
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