I personally don't care which brand of depth finder you buy, as long as it works as advertised. If you need to send it in for warranty work I would definatly go thru Linda or at least make sure you have direct contact info for someone there at Lowrance.

There is another software update that we can do for you as well that just came out about a week ago that might finally solve the issues that you are having

Things that I would try to solve this would be to

1. Check all power cords/wiring to make sure the proper gauge wire is being used. If you are hooking up the Lowrance power cord direct to the battery, try hooking your power head up to a buddies power cord that you know works and see if that is the problem. Any blue connector will work with your HDS just fine. If the unit runs fine there, you just have a faulty power cord.

2. Assuming this doesn't work, try the hard reset. Hold zoom in, zoom out and the power button when turning the unit on, DO SAVE ALL WAYPOINTS/ SONAR SETTINGS ETC BEFORE DOING THIS. IT WIPES THE UNIT CLEAN!

3. Do the software upgrade ( I would do this anyways as it is suppose to give you the ability to hook up their structure scan )but to troubleshoot it at this point, put it down on the list.

If none of these work, my guess would be that it should be sent to Lowrance as there is a loose wire intenally. Lets hope it isn't that.

Let us know how it turns out.