Less than a year old pair of 998hd with GPS heading puck right above TM transducer and the puck you get with the unit mounted on back. All was well until 2 trips ago when I couldn't get GPS or Navionics. I called HB and they gave me a step by step procedure (that I wrote down). Tried that still no go. When I get to the graph that shows what is and isn't connected, everything but temp shows as being unconnected. Where do I look?

Thanks in advance

Pappa