Looks like the Mister Handy located in the McClellan family townhome, in Georgetown is missing its audio. I speaks like a New Vegas bot although its supposed to read a miserable bedtime story to 200 year old dead kids and try to get a dead dog to walk.
http://fallout.wikia.com/wiki/McClellan_family_townhome
Its a pretty mild problem, the mister Handy still goes where its told, and the subtitles are still there, all that's missing is audio.