Is the power input center pin + or - on the ENH908-NWY?
Try contacting the manufacturer.
Or, if the old AC adapter still works, it might be written on it. If not, try it with a multimeter.
If you don't have a multimeter, you can ground one contact of a light bulb and with the other contact see where the current is coming from (know that this is completely at your own risk: don't experiment with electricity unless you really know what you're doing!!)
×