Look at the end of the charger plug you will see a color ring near the tip, take the tip and carefully look for the hole, it will be on the side or the back of the laptop slightly bigger than plug and will have a little drawing showing a circle with + and - showing.
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Look at the end of the charger plug you will see a color ring near the tip, take the tip and carefully look for the hole, it will be on the side or the back of the laptop slightly bigger than plug and will have a little drawing showing a circle with + and - showing.