There was a thread with this title "dell d610 won't power up w/ac adapter but it will power on with the battery" two years ago which was never resolved. It involves the power adapter light going out when it is plugged into the laptop. The laptop works fine off battery none of three charges will work with it though. Rik from RCE said he might have an answer down the track but I can't find it if there is one. It's a common problem apparantly, has anyone got an answer?