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If possible, disconnect all power cables from the existing system before you add a device. • Before connecting or removing signal cables from the motherboard, ensure that all power cables are unplugged. • Seek professional assistance before using an adpater or extension cord. These devices could interrupt the grounding circuit. • Make sure that your power supply is set to the correct voltage in your area. If you are not sure about the voltage of the electrical outlet you are using, contact your