Can anyone help . I turned on my gps last weekend to find that when the checklist comes up on the screen & oks everything my receiver OK then below that the antenna kept coming up NO & then rechecking doing the same over & over. I checked the connection at the gps & I hadnt used it for probably 2 months but hadno probs before . Only had boat for 8 months. 1995 Approx. Does anyone know any repairers in south of sydney & if it is worht trying to fix such an old unit . But it is all I need , very basic .