Technical Product Specification

Intel® Server Boards S5000PSL and S5000XSL TPS Intel® Light Guided Diagnostics
Revision 1.7
Intel order number: D41763-008
57
7.5 Processor Fault LEDs
The server board provides a fault LED for each processor socket. These LEDs are located near
the processor sockets.
AF000206
Figure 22. Processor Fault LED Locations
7.6 Post Code Diagnostic LEDs
The POST code diagnostic LEDs are located on the back edge of the server board in the rear
I/O area of the server board between the PS/2 mouse/keyboard stacked connectors and the
video/serial stacked connectors.
During the system boot process, the BIOS executes a number of platform configuration
processes, each of which is assigned a specific hex POST code number. As each configuration
routine is started, the BIOS displays the given POST code to the POST code diagnostic LEDs
on the back edge of the server board. To assist in troubleshooting a system hang during the
POST process, the Diagnostic LEDs can be used to identify the last POST process to be
executed. See Appendix C for a complete description of how these LEDs are read, and for a list
of all supported POST codes.