I remember signs at the wall, but I'm not sure if they are helpfull or not. But if you see plates that move when you stand on and always 2 of them have the same icon on it, standing on 2 similar ones at the same time was about the first thing that came to my mind. But to be fair I did it the first time back in the days when you didn't even consider entering a public dungeon alone, so naturally there were players around who could fill the other spot.Ok, thank you for the answers.
Still curious as to how we are supposed to figure that out?
Is there a book somewhere maybe?
I don't see anything on the walls...
It is a very simple skyrim style puzzle. You stand on the symbols and notice they depress. As you and your partner stand on them in random order, you discover standing on two at a time sometimes causes pillars of light to form. Then you notice these pillars only form when standing on matching symbols. So you stand on matching symbols. Then scorpions, spiders and undead come. You kill those. Or they kill you. Skill Point if you survive.