A user reports a noticeable grinding noise coming from a PC even during light workloads. After removing the case cover, the technician finds no visible damage or loose parts. According to CompTIA's troubleshooting methodology, what is the NEXT step the technician should take?
Research likely causes and solutions using vendor documentation or online knowledge bases.
Run the system's built-in hardware diagnostics to isolate a failing component.
Replace the mechanical hard drive immediately, assuming it is causing the noise.
Reset the motherboard BIOS/UEFI settings to factory defaults.
The technician has already identified the problem and gathered initial information. The next step in the CompTIA troubleshooting process is to establish a theory of probable cause, which may include conducting internal or external research. Consulting manufacturer documentation, service bulletins, or reputable technical forums helps form an educated hypothesis before any parts are replaced or settings changed. Replacing hardware or running diagnostics would come after a probable cause has been established, and resetting BIOS settings is unlikely to address an unidentified grinding noise.
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