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Gps is not showing any led signal in pixhawk cube

Hi
Am using pixhawk cube and here2 gps module (both are new tgings ). When am intially given to the power on that time blue light was appeared then after any led will not showing (blue, green , yellow) .but i have get the 3d gps lock .when am arming nothing to say error immediately armed .what is the problem. Please any body help me

same problem
also getting some error gps failing configuration checks

Servers by jDrones