The three most likely causes, in descending order of probability: 1.  A damaged DC plug on the AC adapter. 2.  A damaged DC jack in the system 3.  A faulty charging circuit. Try another OEM Dell AC adapter first.  If it's recognized, your adapter is the issue.  If not, replace the DC jack.  If you need  a part reference, post the system model number. If neither of those solves the unrecognized adapter issue, the charge circuit is bad.  Depending on the age of the system, the replacement system board required may or may not make economic sense.  
Hi everyone, I've got a latitude and I'm facing the "ac adapter wattage and type cannot be determined " issue. This is my first time using Dell and I'm unsure about what to do.  I've ordered a battery replacement but after reading some recommendations and seeing the diagnostics results, I've cancelled the order. What could be the problem? Thanks. [IMAGE]  
AC Adapter or Battery Problem?