RL80C - NO FIX

[[email protected]]

I have a RL80C Multifunction Display (2004) Ray Marine. I purchased boat last June, all functions working great on the unit.
This past weekend I started the unit and the GPS came up with maps but had "NO FIX" top right corner of display. I checked GPS settings and the sats are displayed, no sats located. I restart gps and sometimes it finds the sats and NO FIX go off and my map and location starts to work but sometimes I have to restart gps numerous times before finding sata. A few times the gps never finds sats.
I removed and reset the cables on the unit, no changes.
This just started happening this past weekend, never had an issue with it not locating the sats.
Could this be a faulty antenna or intermittent issue with the unit itself.
Any troubleshooting tips?

Thank you
Joe