Hi. Does anyone know how to open the gate behind the first boss pls?

I didn't find any chain or lever to pull, there's only a button near the entrance of the room and it does nothing.

P.S. It's the dungeon near Winterhold, the one where you recover a helm for the jarl.

It won't open if you do the dungeon at too high a level. If the boss is anything other than a spectral Draugr I think was what I read in the report. It breaks the trigger or something.

But you can go to the back entrance and open that to get to the chest.

http://www.uesp.net/wiki/Skyrim:Yngol_Barrow

Thank you guys, if I miss only a chest it's not a big deal