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Can't determine laptop polarity - HELP!

Discussion in 'General Electronics' started by Calab, Jan 3, 2009.

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  1. Calab

    Calab Guest

    I have a Gateway T-6815 laptop. The power brick was lost a while ago. I now
    have a generic laptop power brick.

    I cannot determine the polarity that the laptop needs? There is no tip/ring
    diagram. All that it has is:
    19v ----- 3.42 A (thats a solid line over a dashed line)

    So... does that tell me anything? Is it possible that the laptop doesn't
    care about the polarity?
  2. Gnack Nol

    Gnack Nol Guest

    It is very defiantly polarity sensitive don't try to use just any
    connection polarity or you will damage it.

    Your best bet is to go to Ebay and look for one. I just looked
    and there are many for sale from $10-20 new and used. Buying a
    universal supply from a regular supplier would cost much more and using a
    general purpose wall wart will not work since the supply is a switching
    type and the computer is very sensitive to noise in the power supply.

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