System-board LEDs
The following illustrations show the light-emitting diodes (LEDs) on the system board.
Figure 129. System-board LEDs
Table 45. System board LEDs descriptions and actions
LED
Descriptions and actions
1 System error LED (yellow) LED on: An error has occurred. Complete the following steps:
1. Check the identification LED and check log LED and follow the
instructions.
2. Check the Lenovo XClarity Controller event log and the system error log
for information about the error.
3. Save the log if necessary, and clear the log afterward.
2 Identification LED (blue) This LED is used as a presence detection LED. You can use Lenovo XClarity
Controller to light this LED remotely. Use this LED to locate the server among
other servers visually.
3 XCC heartbeat LED (green) This LED indicates XCC heartbeat and boot process:
• LED blinking fast: XCC code is in the loading process.
• LED going off momentarily: XCC code has loaded completely.
• LED going off momentarily and then starts blinking slowing: XCC is fully
operational. You can now press the power-control button to power on the
server.
140 ThinkSystem SR850 Maintenance Manual
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