Turning on ice fishing mode Helix 10 SI Gen 3

I’ve read the Humminbird instructions and watched you tubes, can’t find ice fishing listed on any menu? Any suggestions

Hit the menu button twice, scroll down toward the bottom of the “Sonar” tab. There should be setting named “open water”. Change that to ice fishing mode by clicking the right arrow. If you don’t see that setting, it could be that you need to do a software update.

so I restored defaults. Download the current software 2.930. Turned unit on, removed my map chip and inserted 4GB SD card. But the Unit didn’t acknowledge it?

Hmmm. You’re absolutely certain you downloaded the correct update for your specific unit? I have had it happen where it takes a few minutes for the unit to recognize the card. As long as you followed the instructions exactly per the HB website I don’t know what to tell you. Other than trying a different SD card.