CP6006-SA – User Guide, Rev. 0.5 Preliminary
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2.7.
Board Interfaces
2.7.1.
Front Panel LEDs
The CP6006(X)-SA provides three system status LEDs, one Hot Swap Status LED (HS LED), one temperature status
LED (TH LED) and one Watchdog status LED (WD LED), as well as two IPMI LEDs (I0 and I1) and four General
Purpose/POST code LEDs (LED3–0). Their functionality is described in the following chapters and reflected in the
registers mentioned in Chapter 3, Configuration.
2.7.1.1.
Watchdog and Temperature Status LEDs
Table 6: Watchdog and Temperature Status LEDs’ Functions
LED
COLOR
STATE
FUNCTION
TH LED
red
/ green Off
Power failure
Green
Board in normal operation
Red
CPU has reached maximum allowable operating temperature and the
performance has been reduced
Red blinks
CPU temperature above 125°C (CPU has been shut off)
In this event, all General Purpose LEDs (LED3–0) are blinking red as well.
WD LED
red
/ green OFF
Watchdog inactive
Green
Watchdog active, waiting to be triggered
Red
Watchdog expired
If the TH LED flashes red at regular intervals, it indicates that the processor junction
temperature has reached a level beyond which permanent silicon damage may occur and
the processor has been shut off. To turn to normal operation, the power must be switched
off and then on again.