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Studio Display M4551 power cord polarity

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I just bought a Studio Display (M4551), with no power adapter and unfortunately this kind of adapters could not be found in my area. I've seen few items on eBay, but they were too expansive and including shipping to my destination it would have been more than 3 times more than the cost of the display itself. So I was thinking of finding some alternative or using iBook power adapter which has the same output, but I can't find information on the polarity (positive/negative) of the display's power cord. Polarity isn't mentioned on the original power adapter. Does anybody have this kind of adapter to check the polarity? Thanks in advance!

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well my multimeter pins are to big to both fit in the power adapter but with plug pulled partially out , the outside shows as ground (no voltage) so that would mean center pin is the 24 volt positive.


I pulled my cord out just a little to be able to check that.

Edited by Macdrone
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