My Dell 90W AC adapter just stopped working and got really hot. How do I replace it?

Yeah it was really weird, it stopped charging and the box got really hot. What happened? Do I need to call Dell to get it replaced, or will wal-mart have the same one?My Dell 90W AC adapter just stopped working and got really hot. How do I replace it?and adaptor should be covered under the warranty, call dell and ask them about itMy Dell 90W AC adapter just stopped working and got really hot. How do I replace it?You can order it online from Dell or try and buy a generic one (not recommended).