If the RUN light on the CPU of a PLC is not illuminated, what should be your next action or check?

A+ Guide to Hardware (Standalone Book) (MindTap Course List)
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ISBN:9781305266452
Author:Jean Andrews
Publisher:Jean Andrews
Chapter1: First Look At Computer Parts And Tools
Section: Chapter Questions
Problem 6RB
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19.a. If the RUN light on the CPU of a PLC is not illuminated, what should be your next action or check?
A. Check the power supply's indicator light.
B. Replace the CPU.
C. Issue a START command at the console or laptop.
D. Check for a COMM error light. 

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