I had to do the following update to mine, works fine now
HOOK 7 - with GPS Rollover Patch
Release Date: 11 April 2019
Version: 3.0 (GPS Rollover)
On April 6, 2019, a GPS Rollover event occurred.
GPS Rollover events occur every 20 years due to the date and time scale used by the Global Positioning System (GPS), which is based on counting weeks and seconds within a week. When the counter reaches 1024 weeks, it rolls back to week zero. If GPS products are designed without taking this into account, problems can occur with GPS products including incorrect date and time values and/or the loss of position information. Lowrance can confirm that all current generation devices are 100% compatible with the recent GPS week rollover event. There, however, are several legacy products that will require a software update.
Upgrade Instructions
1. Download the file
2. Copy to a blank micro SD card
3. With the unit turned off insert Micro SD in to the card reader
4. Turn on the Lowrance display. (If the update does not automatically start, follow the steps below)
a. Elite HDI/CHIRP & HOOK
i. Press Menu twice
ii. Arrow down to Browse Files
iii. Select the SD card
iv. Select the update
v. Press enter
5. After the update has completed, remove the SD card. The unit will shut down
6. Press power key to restart the unit
Download HOOK 7 - with GPS Rollover Patch