BGW210 Questions

I am currently having issues with my BGW210 - the broadband light is consistently solid red. I’ve tried multiple locations in the house and even gone into the modem settings but cannot reset my broadband.

I called AT&T (atrocious service), and after 75 minutes, they are sending a tech out in 3 days. They had me go to some “battery” box in my closet to do a power cycle. That didn’t help. Also, when my wifi was set up nearly a year ago, the tech never looked at this battery box.

Does anyone have any experience or suggestions? I’m an online student and need home internet prior to Tuesday. Thanks!