Don't have a multimeter, unfortunately.
And I'm a bit confused on the polarity of the adapter. There's nothing to indicate the polarity, and no instructions came with it. I've done a bit of searching online to figure it out, but haven't found much direction yet - at least nothing that helps with this adapter.
Rich, the tips have the two prongs, like you said. And at this point, I'm pretty sure I've had the tip on both ways and plugged the adapter into the wall both ways
(both prongs are the same size
), and I'm still getting no juice. At least the battery is still working, so I haven't damaged it.
I may get time tomorrow to stop by Radio Shack and look at tips. It may just be that the tip is too small. If I can't find something that works, I'll return the adapter....I have a friend working on repairing my old broken 790 adapter, and that may end up being the best option.
Anything else I should check?