You leave the room, then, with the Geometamorpher sparking and glowing ominously. Cracks start forming in the walls of that round room- where the device ended up after the Sith used it to defeat the Republic here on Ord Coridari. It won't survive another eruption, not now that you've damaged it.
You are very disappointed to find that Rand has severed the bridge; it has fallen into the lava flow. However, he did not destroy the main supports hanging from the ceiling, though they sway dangerously now as the quakes begin.