Industrial Machinery Electrical System Troubleshooting

I need an expert to troubleshoot an industrial machinery electrical system. The issue is that the servo motors are not activating.

The following diagnostic tests have already been performed:
- Voltage testing
- Continuity testing
- Control signal testing

Ideal skills and experience:
- Expertise in industrial machinery electrical systems
- Experience with servo motors
- Proficient in voltage, continuity, and control signal testing
- Problem-solving skills to identify and rectify complex electrical issues

Please provide a detailed plan and your relevant experience.