Problem with a Marantz AV9000

Anyone out there still own one of these? I know by technology standards its a dinosaur, but mine is still going strong except for one issue. If I unplug it or we have a power outage, it loses all of its settings. I thought it was not supposed to do that. I still use it on a daily basis, mostly for movies, but some music too. An Acurus 125x5 amp supplies the power.
Thank you in advance to anyone who can help me.

I've lurked on Audiogon for quite awhile but joined a few months ago.
-J