Archived Link: http://web.archive.org/web/20180829005818/https://www.accuweather.com/en/us/national/weather-forecast-maps
Has the errors saved in time, so future redditors can see the site for themselves.
It doesn't look like any Arch or Debian boot sequence I've ever seen.
Unfortunately I haven't been able to pinpoint any details aside from the pump running an ARM-based CPU. I did find the firmware chip on Amazon, but I ain't keen on sinking $200 on a whim (not to mention that I lack the equipment or know-how to even think about trying to dump it).
Quote from Slack Linux minimal requirements:
if the guys who are managing the screen use the same wifi that everyone uses for the screen:
https://play.google.com/store/apps/details?id=com.samsung.mobile.contentcreator&hl=en&gl=US
Have fun!