Tweak the settings until the indicator light glows yellow. Clues are on the board to the left. Knock papers off. These are the settings to solve the third puzzle: x1-66: L and R both in the middle 5246-k: Slider and knob both all the way to the right CP 547: Slider in middle, dial at 2nd notch from left J&E 801: 3rd set of numbers from left See images for more help.