I found product listings and specs but not an official PDF manual. Here’s a concise summary of the EverStart 6811A smart charger based on available sources:
DIAGNOSTIC LOG: UNIT 6811A
The screen went black. Then white text appeared, monospaced, like a terminal: everstart 6811a smart charger manual
Verify the AC outlet is live and the internal fuse is intact. If the battery is below 2-3V, the charger may not detect it to start. I found product listings and specs but not
“The EverStart 6811A does not charge batteries. It reminds them what they’ve forgotten.” everstart 6811a smart charger manual