The yellow power light indicates that the computer and auxiliary power supplies are working. The 12V should come on when the system is turned on and the computer is working. If the monitor displays the start-up information but the yellow power light is off, replace the bulb (#53 miniature bayonet).

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• Be sure there is power to the machine. Can be single or 3 phase, depending on setup

• Check that disconnect on spindle cabinet is ON.

• Check that the CNC Control is plugged into the 110V socket on the back of machine.

• Check the fuse on the back of the CNC Control.

• Check fuses on step-down transformer in spindle cabinet.

• Check the connection on the motherboard from the power on switch

• Check the motherboard power supply power cable is connected