Hai Friends

                     My Dell 5558 go to sleep when i plug AC adapter  while using it.I diagonised using all software tools provided by dell.At last I contacted dell toll free technical support and with out checking itself The technical team agent is saying that it wont go to sleep there is no way to go to sleep etc.why you calling here for this type of issues.Actually i had paid and extended warrenty.he is saying its not a issue. for people who are working on laptop who had to connect external power source while working that time its go to sleep is a issue.Please make any solution for this.atleast respect the money i had paid to dell