Specifications

Intel® Server Board S3420GPRX TPS Intel® Light Guided Diagnostics
Revision 1.1
Intel order number E92065-001
99
8.2 Post Code Diagnostic LEDs
Eight amber POST code diagnostic LEDs are located on the back edge of the server boards in
the rear I/O area of the server board by the NIC1 / 2 connector.
During the system boot process, the BIOS executes several platform configuration processes,
each of which is assigned a specific hex POST code number. As each configuration routine is
started, the BIOS displays the POST code on the POST code diagnostic LEDs found 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 executed.
Figure 41. Diagnostic LED location
Table 67. POST Code Diagnostic LED Location
A ID LED B Status LED
C Diagnostic LED #7 MSB G Diagnostic LED #3 LSB
D Diagnostic LED #6 MSB H Diagnostic LED #2 LSB
E Diagnostic LED #5 MSB I Diagnostic LED #1 LSB
F Diagnostic LED #4 MSB J Diagnostic LED #0 LSB