ASROCK B550 PG Riptide - 2.9 M.2 2230 WiFi;BT PCIe WiFi module Installation Guide (M2_3)

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B550 PG Riptide
2.7 Post Status Checker
Post Status Checker (PSC) diagnoses the computer when users power on the
machine. It emits a red light to indicate whether the CPU, memory, VGA or storage
is dysfunctional. e lights go o if the four mentioned above are functioning
normally.