Technical Product Specification

Table Of Contents
Intel® Light-Guided Diagnostics Intel
®
Server Board S5400SF TPS
Revision 2.02
Intel order number: D92944-007
138
8. Intel
®
Light-Guided Diagnostics
The server board has several on-board diagnostic LEDs to assist in troubleshooting board-level
issues. Functionality of the on-board LEDs is owned by the Integrated BMC and system BIOS.
Many of the LEDs are controlled via the SIO. The Integrated BMC and the BIOS use a chip-
specific method to avoid contention when accessing the SIO-based LEDs.
This section shows where each LED is located and provides a high level usage description.
8.1 5-Volt Standby LED
Several server management features of this server board require that a 5 volt standby voltage
be supplied from the power supply. The Integrated BMC within the Intel
®
6321ESB I/O
Controller Hub, on-board NICs, and optional Intel
®
RMM2 are some of the features and
components that require that this voltage be present when the system is “Off”.
The LED located just below the system recovery jumper block labeled “5V STBY” is illuminated
when AC power is applied to the platform and 5 Volt standby voltage is supplied to the server
board by the power supply.
AF002173
Figure 46. 5V Standby Status LED Location