I recently purchased a pursuit 3000 with a flush mount furuno DGPS GP-1850 (either DF or F) with Navionics Classic chip. The original chip is from South Florida and I purchased one for Mobile – Tampa. I inserted the chip, turned on the unit and the chart appeared. As I was becoming familiar with the unit and ensuring settings where I want them, I received a message that said “no chart” when I pushed the plot key. I turned unit off, took out chip and reinserted, same thing. I switched out with the original chip and same message. Have looked thru owner’s manual and several forums but not luck. Any suggestions?