My HDS 7 would not show any detail when I was stopped. Screen kinda washed out when I stopped and it always shut off on it's own like it was getting hot. Talked to lowrance and installed all updates and it done the same thing so I sold it and bought a Garmin. Have the old 510C on the front of my boat for years and still love it. Don't have these problems with the new Garmin. Never got the HDS to work like it should have.