Wai Hayang, 32, was working on top of the giant screen when he apparently touched high-voltage cables running above it. He died instantly, and collapsed on top of the screen.
It took a couple of hours for rescue workers, using a cherry picker, to retrieve his body and bring it down to the ground.
Traffic was severely disrupted by the rescue work and by the crowds of gawkers on the side of the road watching the unfolding drama.