Here's the manual for it:I'm a guitar pedal noob. Got a BOSS ns2 today (free). It is brand new. Can't get it to power on. I'm sure I'm just an idiot and there is a simple solution
http://www.americanmusical.com/ItemF...NS2_Manual.pdf
I know these don't power up with nothing in the input jack, but it looks like you're covered there. For shits and giggles, connect something to the return/send. It may require those as well (I'm not familiar with the NS2, I use an ISP).
Obvious question - the power supply is good, right? (Do you have a meter you can test it with?)
Edit: Also, is it the factory power supply, or a One Spot? Check the brick and make sure it's DC9V at 20mA.