GPS Question

I have a stupid question about my GPS system. I have a Lowrance 3500 Global Maps 3500c. The unit works…such as speed and it finds my position but I bought a new chip and when I put it in, the screen just blinks and I see a generic screen with no map. Do I need to do something different or should I just be able to put the chip in and use it? I have always owned Humminbird and don’t know if Lowrance is different.

I used to have a Global Map 7600C and I bought a new Navionics HotMaps Premium for it and it did the same thing. I was told I needed to find a chip that was a 1998 or older and it would work fine. I found a 1997 HotMaps Premium at Reeds in Walker,Mn and it worked fine and showed everything.

I had a similar issue with my HDS 5 Gen 1, maps from the chip wouldn’t work. Downloaded software updates per their recs, different chips in different regions didn’t work, ended up getting it warrantied, now works perfectly.

Thanks for the feedback.