Determine proper output voltage setting. Check rating plate and the voltage indication marked next to the input jack on your computer. You may find the voltage in your AC adaptor or in the computer user' s manual. Set the voltage switch on the body of the adaptor in the proper voltage. Determine proper connector size. Please note that the polarity of the connector plugs are presented with the positive tip in centre. Reversed polarity can result in permanent damage to your computer
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