How can I find the IP address of a router 2 years old

I have a D-Link DI-1137 router, which was used in one of our firms other two offices, these offices closed, and so now has been sat on a shelf gathering dust. I have done the following:

1) pinged the possible IP address’s, of 10.0.94.200 or 94.250, 10.0.95.200 or 95.250
2) connected it via a small powered switch to the laptop
3) set the laptop IP address to 10.0.95.201, and the same subnet mask.
4) ran “Advanced IP Scanner v1.5 from www.radmin.com” on the laptop, and scanned the range of 10.0.0.0 to 10.0.255.255, no response has been detected by the app from the router.

I have got no ping backs at all, I dont know what to do, and I desperately need to get this router up and running.

Has anyone any suggestions?

Thanks

James