Orbi RBR40 will not connect to new Cable modem

Hi all,

I really want to thank everyone who responded. All of your responses were very helpful, and I have saved them for future reference. Fortunately, after spending an hour and a half on the phone with our ISP yesterday, we were able to get connected using one of their modems. a Hitron. Wouldn't have been my first modem choice, but it's working, so we're going with it. The reason I was trying to avoid a factory reset is because I am visually-impaired and use a screen reader, and let's just say Netgear could do a much better job of making their product configuration screen-reader friendly. So resetting is always my absolute last resort. Anyway, thanks all for your very helpful input. 

Cheers!