I've read many of the posts on this board about folks who have had problems with this unit, and I'm having the same sort of problem. It was purchased 3-9-2012 from Amazon and it was a few months before it could be mounted on my pontoon boat. From the first I could never see the picture quality that I have seen in the ads or the pics on this forum. In fact, I don't remember ever seeing a fish symbol.

At first the depth reading worked, but got to where it would flash between 1.6 feet and perhaps the real depth. Still no structure or fish. Just the bottom. The transducer is mounted behind the right pontoon and the readings continue erratically whether the motor is running or not. I've adjusted and readjusted the transducer angle to no avail. Also cleaning the face. I recently had a bass boat with two depthfinders on it--one a H'bird--and never had any problem with them.

My son and I tried all sorts of menu adjustments for Friday, Saturday, and Sunday. No help. So I got in a chat session with H'bird this am and was told to send the unit and transducer in. Looking on their site it says to send in $103.45 with the unit.

Apparently the 570DI's have problems from what I'm reading, and I wish I could go back and just get a better depthfinder with what I'm about to invest, including the original price of $279.

The transducer seems to be working as I can hear it pulsing on the FM radio at about 107. I have the depthfinder here but the boat is 50 miles away on the lake, so I don't know what software version or what.

Anyway, I read that there was a way of making or obtaining a cord to do the updating yourself. I'd appreciate any help or advice from you guys. I'm at my wit's end....