I have to send in my head unit for replacement. The company who administers Lowrance's warenty work, offered to upgrade my Gen 2 Touch 7 to a Gen 2 Touch 9 for $230. Sounds like a pretty good deal to me.
I have heard of some other people that were offered the same thing and what they got was a refurbished one that didn't last that long. Which they had to go through the process all over again paying more money. Good Luck!