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Appendix C. System Status LED State Definitions
The Intel® D50TNP Modules include a control panel that provides push button controls and LED indicators
for several features. This section provides a description for each front control panel feature.
•
Power button with integrated LED – Toggles the module power on and off. This button also
functions as a sleep button if enabled by an ACPI compliant operating system. Pressing this button
sends a signal to the integrated BMC that either powers on or powers off the module. The integrated
LED is a single color (green) and supports different indicator states as defined in the following table.
Note: After AC power is connected, several subsystems are initialized and low-level FRU discovery is
performed. This process can take up to 90 seconds. When this process is completed, the ID LED will
turn solid on, indicating that the system is ready to be powered on.
Power Mode
Non-ACPI
ACPI
•
Module ID button w/ integrated LED – Toggles the integrated blue ID LED on and off. The module ID
LED is used to identify an Intel® D50TNP Module within a chassis for maintenance when installed in a
rack of similar server systems. The module ID LED can also be toggled on and off remotely using the
IPMI "Chassis Identify" command that causes the LED to blink for 15 seconds.
•
NMI Button – When the NMI button is pressed, it puts the Intel® D50TNP Module in a halt state and
issues a non-maskable interrupt (NMI). This can be useful when performing diagnostics for a given
issue where a memory download is necessary to help determine the cause of the problem. To
prevent an inadvertent module halt, the actual NMI button is located behind the front control panel
faceplate where it is only accessible with the use of a small tipped tool like a pin or paper clip.
•
Module cold reset button – When pressed, this button reboots and re-initializes the Intel® D50TNP
Module. Unlike the power button, the reset button does not disconnect the power to the module. It
just starts the module's Power-On Self-Test (POST) sequence over again.
•
Module status LED – The module status LED is a bi-color (green/amber) indicator that shows the
current health of the module. The module status LED states are driven by the integrated platform
management subsystem.
Intel® Server D50TNP Family Integration and Service Guide
Figure 290. Front Control Panel Features
Table 6. Power / Sleep LED Functional States
LED
Module State
Off
Power-off
Module power is off, and the BIOS has not initialized the chipset.
On
Power-on
Module power is on
Mechanical is off and the operating system has not saved any context to
Off
S5
the hard disk.
On
S0
Module and the operating system are up and running.
Table 7
provides a description of each supported LED state.
Description
199
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