It's not entirely uncommon for this to happen, seems like a bug in the PoE firmware. To rectify this, simply turn off PoE for the affected ports then turn it back on. All devices utilizing PoE comes back online after the switch decides to send some current their way... :-)
Short CLI-example:
Configure terminal
interface fastethernet all
poe poe-shutdown port 1/1-48
no poe-shutdown port 1/1-48
exit
Best regards,
Øyvind Nikolaisen
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