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2.14 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. The lights go off if the four mentioned above are functioning normally.
It is normal for the DRAM status LED to blink during memory training. This indi
cates the system is working properly.
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