Hughesnet internet modem

Hi I'm new here  but I've been having trouble with my modem  isn't working  I've checked the coax cables  and  checked all the  hook ups  from modem to the TV  everything is correct  I've unplugged and plugged it back in still nothing  it's been two days  sometimes  all the lights work except for one the system light isn't on  and the LAN light isn't on  and  sometimes all the lights work except the one light the system light  like right now all the lights are on except for the system light and the LAN light help help