Don't have the manual for that one, but on other earlier models JP1 and JP2 if present either forced one of the two ports or autosensed which port to use, and the other jumper would disable/enable the link integrity feature (disable for really old hubs predating 10base T spec only) underlying the green led. I think you can experiment with JP1 and JP2 without fear of killing any components. The usual default was jumpers not bridging for most cases, enabling autosense of which port and sensing link integrity. No green led at the Asante usually means bad cable, cable not seated deeply enough, crossover cable instead of straight thru patch cable, or hub port not powered, but could be dead Asante card also.