Experienced similar probs on our Hysucat, rib got used approx 5 hrs a week 50 wks of year
Went through 3 plotters and 2 fishfinders, getting Plastimo to even acknlowedge a ph call, email like pulling teeth, got every excuse under the sun
we didnt recieve the returns
the guy dealing with it has left
we sent it did u not get it
we will send it again
in the end after waiting 3 and half months for the last return,
I mailed em telling them I was flying to the London Boat show and would make a scene at their stand,
Had a replacement 4 days later
do a search here for Plastimo
Navman
http://www.rib.net/forum/showthread....light=plastimo