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Intel® Light Guided Diagnostics IntelP®P Server Board S3420GP TPS
8. Intel
®
Light Guided Diagnostics
The server board has several on-board diagnostic LEDs to assist in troubleshooting board-level
issues. This section shows where each LED is located on the server board and describes the
function of each LED.
8.1 System Status LED
The server board provides a system status indicator LED on the front panel. This indicator LED
has specific states and corresponding interpretation as shown in the following table.
Table 53. Front Panel Status LED Behavior Summary
Color State Criticality Description
Off N/A Not ready AC power off. If no degraded, non-critical, critical, or non-recoverable
conditions exist.
Amber Solid on Critical, non-
recoverable
Fatal alarm – system has failed or shutdown:
Thermtrip asserted.
Non-recoverable temperature threshold asserted.
Non-recoverable voltage threshold asserted.
Power fault / Power Control Failure.
Fan redundancy lost, insufficient system cooling. This does
not apply to non-redundant systems.
Uncorrectable memory error.
Amber Blink Non-critical
Non-fatal alarm – system is likely to fail:
CATERR asserted.
Critical temperature threshold asserted.
Critical voltage threshold asserted.
Critical fan threshold asserted.
VRD hot asserted.
SMI Timeout asserted.
Correctable error threshold has been reached for a failing
DDR3 DIMM.
Green Solid on System OK
System booted and ready.
Green Blink Degraded
System degraded:
Non-critical temperature threshold asserted.
Non-critical voltage threshold asserted.
Non-critical fan threshold asserted.
Fan redundancy lost, sufficient system cooling maintained.
This does not apply to non-redundant systems.
Power supply predictive failure.
Unable to use all of the installed memory (more than one
DDR3 DIMM installed).
Correctable error threshold has been reached for a failing
DDR3 DIMM on a given channel.
Revision 1.0
Intel order number E65697-003
84