What should I do if the main storage LED is flashing red?

If the main storage LED on your HP EliteDesk 800 G5 Desktop Mini PC flashes red, it indicates a diagnostic code that corresponds to an issue with the computer's primary storage. Check POST numeric codes and text messages for further troubleshooting details (Page 82).

From the official HP Elitedesk 800 G5 Desktop Mini PC manual, page 82

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