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AC Adapter - Inspiron 7000
I've just bought the above with the correct Adapter (PA-4). The original plug (that which fits into the laptop) has been replaced and the new one has a removable tip which can be set as either Tip +ve or Tip -ve. Unfortunately in transit to me the tip became detached from the body!!!! Hence I do not know which setting to use. Could a kind person tell me which it should be or, alternatively, simply say which part of the plug is +ve or -ve. Many thanks.