I think B is correct. He has established a theory "technician thinks a desktop PC has failed due to a defective power supply." I think the question wants us to assume he has already completed step 1.

I think it's actually A. The suggested answer is step 2 of troubleshooting method and so far he hasn't completed any step in troubleshoot methodology.

Answer is B (step 3). Answer A. Inquire about environmental or infrastructure changes. (Step 1) B. Conduct external or internal research based on symptoms. (Step 3) C. Establish a plan of action to resolve the problem and implement the solution. (Step 4) D. Document the findings, actions, and outcomes. (Step 6) The problem states that the technician has just completed Step 2 by Establishing a Theory of probable cause "thinking a desktop PC has failed due to a defective power supply." So the technician will then go to the next step (3).

The answer is B because he did step 2, which is establish a theory. The next step is test the theory, which also includes conducting research based on symptoms.

I hate this question lol

After trying to plug it into another wall socket, if the PC doesn't turn on, I'd think the PSU is dead. Can't imagine what environmental or infrastructure changes could lead to a dead PSU (NOT A) & I can't think of what there could be on the internet to research about a dead PSU (NOT B). It's kinda like a burned out light bulb. Somethings you fix; somethings you just replace. When the remote control fails, do ask Siri questions?

• Step 1: Identify the problem • Step 2: Establish a theory of probable cause • Step 3: Test the theory to determine the cause • Step 4: Establish a plan of action to resolve the problem and implement the solution So: C&D are not correct since he did not do step 3 which is test the theory. A is more likely the answer since Inquire about environmental or infrastructure changes is part of testing the theory which is defective power supply. For example, the devise might moved to another room with different voltage which cause a power supply.

Question states technician thinks... So logically thinking he needs to confirm it by doing internal external search.

the answer is B this involves gathering more information about the symptoms observed and possibly looking up common issues related to power supply failures in desktop pcs. this research should help the tech confirm or rule out the possibility of a defective power supply and gather insights into troubleshooting steps.

Test the theory to determine the cause. This is step three for COMPTIA's troubleshooting process.

B. Conduct external or internal research based on symptoms: Investigate the symptoms related to the power supply failure. Check for common signs such as no power, flickering LEDs, or abnormal noises. Research possible causes and solutions related to power supply issues.

Through research, the technician might be able to determine if power is the issue.

Answer is B

Following the troubleshooting workflow, the technician has already 1. Identified a problem and 2. Established a theory (power supply) which leads us to step 3. testing the theory - by conducting internal and external research. Next, would be step 4. create a plan of action

• Alwavs consider corporate pOlICIes. procedures. and impacts before imblementina changes 1dentifv the broblem Gather information from the user, laentry user changes, ana, if applicable, perform backups before making changes - Inquire regarding environmental or intrastructure changes Z.Establish a theorv or probable cause question the obvious) - f necessarv. conduct external orirrerne resecrenoasecon sVmoTOns 3. Test the theory to determine the Cause - Once the theory is confirmed, determine the next steps to resolve the problem - t the theorv is not contirmed. re-establish a new theorv or escalate 4Establish a plan of action to resolve the problem and implement the solution - Refer to the vendor's instructions for guidance 5. Verify full system functionality and, if applicable, implement preventive mesures 6. Document the findings, actions, and outcomes

I think you're still on step 1 of the troubleshooting process. He thinks it's the power supply. and part of step 1 is finding out if someone changed something recently. So I think it's A.

I think B too because plan of action is after testing the theory and d is not the answer. he already made a theory so observing is finished.