Forgotten Tales

So I'm pretty sure I have tried every switch combination and spend at least 50 speed potions running to all 4 corners of the plasma mine, and I have no idea what I'm doing wrong. The teleporter takes me to the same room with the plasma rocks, and none of the switch combos seem to unlock the pillars blocking the chest in the lower right of the mine, so all I've done is kill a bunch of plasma mobs and run around in a lot of circles. Help?

In upper right corner of location there is a cave that teleports to a room with malachite ore. With a small chance, this cave can teleport to room you need.