A systems administrator installs two new RAM modules in a server to increase its memory capacity. During the next power-on attempt, the server fails to load the operating system. Instead, the server's front-panel diagnostic LED displays a POST code which, according to the manufacturer's documentation, indicates a 'Memory subsystem configuration error'. Which of the following is the BEST initial action to take?
Update the server's UEFI/BIOS to the latest version.
Replace the new memory modules with the original ones.
Clear the CMOS by removing and reinserting the motherboard battery.
Power off the server and reseat the newly installed memory modules.
The correct answer is to power off the server and reseat the newly installed memory modules. The Power-On Self-Test (POST) occurs before the operating system begins to load and is designed to check for fundamental hardware issues. Since the POST code specifically indicates a memory configuration error immediately after new RAM was installed, the most probable cause is an improper physical connection. Reseating the RAM is the quickest and most direct first step to verify correct installation. Replacing the modules with the originals is a valid troubleshooting step, but only after confirming the new modules are properly seated. Updating the UEFI/BIOS is a more complex step that should be considered later if physical installation issues are ruled out. Clearing the CMOS is a general-purpose reset and is less targeted than addressing the specific component that was just changed.