Problem with Netgear MR814v2 router

[blue_harvester]

I have an MR814v2 router, my brother gave it to me (he had never used it), but when I plug the cable modem into it the internet light does not come on. Even if I plug a computer into one of the four ports, the corresponding light i.e. 1,2,3,4 does not light up. The power and wireless light works fine. I've tried the factory reset button but no joy.

Any ideas?

 

[blue_harvester]

Tried switching the modem and router off, hooking them up, switch modem on, waiting for lights to settle down, then switching the router on?

Yeah, tried that, no joy