Wii U Won’t Boot Past Startup

My Wii U system and controller will power on, however it won’t get past the Wii U startup screen. I’ve tried all the usual fixes like rebooting, holding B to try booting from Wii, unplugging, etc. A few days ago I replaced the CMOS battery and that didn’t help either.

I’d love to fix this system as I have all of my old Wii save data on it as well as Wii U and eShop games. Please let me know if you have any ideas or suggestions. Thank you.