need polarity of power supply for monitor

Odyssey1942

Junior Member
Nov 7, 2005
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I have a Princeton monitor, part # 14AP1702A50, which is powered by a 12V DC power supply-which has walked off.

I see from the back of the monitor that the PS needs to be capable of at least 0.4A, but it does not state the polarity.

Anyone know for sure? Thanks