If your blackboard "malfunctions" (runs out of chalk), it's obvious to a new user what the issue is, and how to fix it (borrow some from so-and-so down the hall

If your blackboard "malfunctions" (runs out of chalk), it's obvious to a new user what the issue is, and how to fix it (borrow some from so-and-so down the hall, or send someone to buy a pack). If your smart blackboard malfunctions, it's not obvious what the problem is (power loss/issue? Software bug? Something else?) and you definitely can't borrow a few ounces of chalk from your neighbor to fix it.