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It doesn't matter which one you turn on first. Press the power button on the front of the PC and switch on the Supply Unit by turning on the Power and Laser switches on the side of the Supply Unit and turning the key 1/4 turn clockwise to the vertical position. The PC can be turned on without switching on the rest of the system so you can analyse or copy data.
Slide down the hatch on the front of the microscope chamber. Make sure there is no sample on the stage. Turn on the LED if it is hard to see inside the chamber. Rotating the white dial clockwise on the top of the chamber will turn on the LED. You will hear a click when the switch turns on, after which the dial increases the brightness of the LED. It can also be switched on and off using the foot switch. If you turn the dial on and see no light, try pressing down the foot switch.
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