A desktop frequently blue-screens and records memory parity errors in the event logs. You suspect that one of the installed DIMMs is bad and want to test your theory without introducing additional variables.
Which action is the MOST appropriate next step?
Install a DIMM that is known to work correctly and observe whether the errors disappear.
Run a disk defragmentation utility on the system drive.
Update and reflash the video card's BIOS firmware.
Remove and reinstall all printer drivers from the operating system.
CompTIA's troubleshooting Step 3 advises replacing suspected hardware with a known-good component to verify the cause. Installing a verified-working DIMM in place of the suspect module isolates the fault: if errors stop, the original DIMM is bad; if they persist, the issue lies elsewhere. Running a disk utility, flashing the GPU firmware, or reinstalling printer drivers do not test the RAM theory and may introduce unrelated changes.
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What are some signs that a RAM module might be defective?
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Why is it important to replace the suspected faulty RAM with known good RAM?
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What are the different types of RAM and how do they differ?