Which of the following actions is NOT part of troubleshooting?

The action described as replacing all components without testing is not part of proper troubleshooting procedures. Effective troubleshooting requires a systematic method for diagnosing and resolving issues, which typically involves identifying the root cause of a problem through careful analysis rather than simply replacing parts on a guess.

Proper troubleshooting follows defined steps, starting with identifying the symptoms of a problem and gathering relevant information. After this, a technician would analyze data, use a systematic approach to isolate the issue, and test various components to confirm the diagnosis. Only after identifying the specific malfunction would replacement of any components occur. This avoids unnecessary costs and ensures that the root issue is addressed rather than just its symptoms, which is critical for efficient and effective maintenance and repair operations.