Ask Computer Networking Questions and Get Answers ASAP
This sounds like the Marantz still has the old network settings stored. The best option will be to reset the Marantz. Follow these steps please.
Hold down MULTI & SPEAKER A/B buttons on the front panel of your receiver simultaneously with the power turned on for 3+ seconds. *Please note ALL settings will be reset to factory default. This includes all of your digital audio and video assignments as well as your radio stations and calibration settings.