Intel DC53427HYE Technical Product Specification - Page 50
States for a One-Color Power LED - bios reset
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Intel NUC D53427RKE Technical Product Specification Figure 10. Connection Diagram for Front Panel Header 2.2.2.4.1 Hard Drive Activity LED Header Pins 1 and 3 can be connected to an LED to provide a visual indicator that data is being read from or written to a hard drive. Proper LED function requires a SATA hard drive or optical drive connected to an onboard SATA connector. 2.2.2.4.2 Reset Switch Header Pins 5 and 7 can be connected to a momentary single pole, single throw (SPST) type switch that is normally open. When the switch is closed, the board resets and runs the POST. 2.2.2.4.3 Power/Sleep LED Header Pins 2 and 4 can be connected to a one- or two-color LED. Table 15 shows the possible LED states. Table 15. States for a One-Color Power LED LED State Description Off Power off Blinking Standby Steady Normal operation NOTE The LED behavior shown in Table 15 is default - other patterns may be set via BIOS setup. 50