On our LM365 Ashland we had to find and turn on the water valve. It is in the island behind the drawers, you'll have to remove a few of the bottom drawers to get to it.
I had a leak In the belly pan on that line that goes from the valve to the slide out. dealer wanted to pull the belly pan off to fix it and I said I would take care of it myself. I was able to fish a new line in and fix it.
A lot of people have found leaks from that line, inside and out. So when you do turn on the valve make sure you do a good inspection around the fridge, under the island, and outside.