Hello zh,
I searched our knowledge base and couldn't find any for the printer rebooting only when connected to the network. I did find an article for when the printer power cycles continuously for you to look at. If you are still having issues after trying these steps, I suggest that you call into our support department for assistance @ 1-800-821-2797 or 1-800-835-6100.
Who has encountered the Xerox WorkCentre 3335 Printer?
We have Xerox WorkCentre 3335-3345, but when connected to a local network via (RG-45), they start to reboot constantly, I would say that it is cyclical, because as soon as it turns on, immediately goes to reboot. But there is a miracle, this same printer works fine via USB. Firmware we upgrade