Intel BB5520UR Product Specification - Page 136
Intel, Light Guided Diagnostics
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Intel® Light Guided Diagnostics Intel® Server Boards S5520HC, S5500HCV, and S5520HCT TPS 8. Intel® Light Guided Diagnostics Both server boards have several onboard diagnostic LEDs to assist in troubleshooting boardlevel issues. This section provides a description of the location and function of each LED on the server boards. 8.1 5-volt Stand-by LED Several server management features of these server boards require a 5-V stand-by voltage supplied from the power supply. The features and components that require this voltage must be present when the system is "power-down" include the Integrated BMC, onboard NICs, and optional Intel® RMM3 installed in the Intel® RMM3 slot. The LED is located near the Intel® SAS Entry RAID Module AXX4SASMOD slot in the lower-left corner of the server boards and is labeled "5VSB_LED". It is illuminated when AC power is applied to the platform and 5-V stand-by voltage is supplied to the server board by the power supply. Figure 54. 5-volt Stand-by Status LED Location 122 Revision 1.8 Intel order number E39529-013
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