/setwaypoint 5996, 6128 This is at the bottom of Lake Solace at the waypoint. Very easy puzzle to do. When the glowie comes up click on it and all the other ones until they are all lit. Than a key will come up to unlock the chest.
If u have lag a lot of times when u play than wait until ur lvl 20 to do the puzzle. Do the achievement Solace of the Lake. U swim around the lake to find 8 objects at the bottom of the lake that gives u bags that u can not open until ur lvl 20. In the bags are vases that give u 8 mins of air and armor stuff, but the vases of air will make doing the puzzle even easier.