3 TV a powerpoint in the loop without Pc?

I have 3 TV on which the same PowerPoint should be run. This should be started centrally. It should run for 1 hour in the loop and then stop. But the best without PC or laptop. Does anyone ever have an idea to realize this?

Think about it or try to see if you get into the conversion of your presentation into a video. Could perhaps be easier to trade from the process.