Used wrong power supply and now it's trash?

We were moving the living room furniture around to do some painting.  When we finished, I was moving a little too fast getting everything back together.  <drumroll, please>  I accidentally plugged a 12V power supply (from the Wiimote recharger) into the Slug and tried to turn it on.  My only defense is that it fit.  Anyway, nothing happened.  When I plugged the right brick in, the slug still did nothing.  It does not light up at all when pushing the power button.

Interestingly, I have a second Slug which works fine.  I have that hooked up now and all is great.  However, if I unplug the working Slug, plug in the dead Slug, and try to turn the dead Slug on, no lights or anything.

Before I toss the dead Slug in the trash, I was wondering if the group can confirm that it's a lost cause.  Is it dead?

Thanks,
Jason