Having problems with your Dell Latitude C640 Notebook ?

I am setting up a Dell C640 for my teenage son I've charged the battery for many hours and reinstalled Windows XP pro clean new. The computer does not switch to battery power when unplugged. It does however show that there is a 100 percent charge through the power settings dialogue


Answers :

Occasionally a defective battery will show charge and not work at all. HP has the same problem on some models. Try a different battery and if it works, then the battery is defective.
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