Konica Minolta ethernet light flashing yellow

My Konica Minolta 2430DL network printer has dropped off my LAN.  The ethernet connection is flashing yellow (though it flashes green at the ethernet switch end).  Self-test printout seems normal but I can't ping it or print to it.  What would cause that problem?  I have cold rebooted it a few times without success.
BloodruleAsked:
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nobusCommented:
the network card of the printer. If it is separate, try to reseat it, or have it replaced.
you can also test the printer on another network connection and /or cable.

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nobusCommented:
what was the cause?
BloodruleAuthor Commented:
Next day it started working again even though the NIC light was flashing yellow.  So at least the printer is working but the reason for the yellow light is unclear.  Maybe it means the NIC is receiving at 10M rather than 100M but even if that is the reason I don't know why it would be doing that.  Thanks for answering my question.
nobusCommented:
was there a power down? that could be the reason
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