Final answer:
Step 2 is where you establish a theory of probable cause in the Six-Step Troubleshooting Process.
Step-by-step explanation:
The Six-Step Troubleshooting Process is a method used to identify and resolve issues in a systematic manner. The step where you establish a theory of probable cause is step 2. Formulating a hypothesis is an important part of troubleshooting as it allows you to develop a possible explanation for the problem based on your observations and knowledge.