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2.15 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.
It is normal for the DRAM status LED to blink during memory training. is indi-
cates the system is working properly.
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