The 3ds sleep function is activated when a speaker (containing a magnet) comes in contact with a spot on the mother board when the top-screen folds down. This happen at about the B button. You can mimic the sleep feature waving a regular kitchen magnet over the area surrounding the B button. This triggers the sleep feature. Therefore, some component of the mother board is responsible for the sleep feature. Has anyone figure out which component of the mother board is responsible for sleep and see if anyone had figured out to re-solder or bypass it.