Hi Jason

1. Is there a transducer and sonar module installed? Many of todays electronics are compenent systems, and you just may need the add-ons (sorry if this is obvious, but I had to make sure)

2. Is it a transom or shoot-through or through-hull transducer? If transom, make sure it is mounted low enough--usually about an 1/8" below hull bottom and slightly angled forward.

3.If transom or through hull make sure that no bubble streams are interfering. That is, there should be NO strakes, through-hulls, seastrainers, etc in front of the 'ducer

4. If shoot-through: is your hull cored or solid glass? Shoot through doesnt work through cored hulls.

5. Check connections.

6. Use a multmeter set to ohms and check for continuity in the cable between display and transducer.

7. Check with Raymarine--what do they say?

Hope this helps

Kevin