Intel BLKDX79TO - Location of the Diagnostic;Status Leds; System Initialization;Board Status Leds

Desktop Board Features
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System Initialization/ Status LEDs
The Desktop Board provides LEDs that allow you to monitor your system’s progress
through initialization and the BIOS POST (see Figure 7). There are also other board
status
LEDs that allow you to monitor other system activities.
Figure 7. Location of the Initialization/Status LEDs