The X100 might not be correctly powered on, try and move the fist-mic cable to see if this causes the fist mic to lose power. If it does loose power contact your local em-trak Marine Electronics Limited dealer and they will assist you.
If the problem persists, contact your local em-trak Marine Electronics Limited dealer.
If the recommended solution has not fixed the issue, then contact your local em-trak Marine Electronics Limited dealer who will assist you.