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Troubleshooting 
 
Table 5-3:  Is the System Power LED Green? 
Answer Possible 
Reasons Possible 
Solutions 
Power On/Standby button has not 
been pressed firmly. 
Firmly press the power button. 
A power supply problem exists. The 
power supply may not be connected 
or inserted properly, it may have a 
damaged connector, or it may have 
failed. 
Be sure that the power supply is 
undamaged, the power supply is fully 
seated, and the power supply LED is 
green. 
The system may have experienced a 
short. 
Check for bent connector pins and 
improperly seated expansion boards. 
The front panel LED assembly has 
failed. 
No, it is off 
 
Be sure that the front panel LED 
assembly cable is connected to the 
power backplane. 
Yes 
If the system power button LED is illuminated green, refer to Table 5-4. 
Note:
  For LED locations and functions, refer to Chapter 4, “Connectors, LEDs, and Switches.” For 
cabling configurations, refer to the HP ProLiant ML570 Generation 2 Server Setup and Installation 
Guide
 
Table 5-4:  Is the External Health LED Green? 
Answer Possible 
Reasons Possible 
Solutions 
No, it is amber 
One power supply has failed; power 
supply redundancy is lost. 
Be sure that each installed power 
supply is securely connected to an 
AC power source. 
Locate the amber power supply LED 
to Identify the failed power supply. 
No, it is red 
All installed power supplies have 
experienced a failure. 
Remove all AC power from power 
supplies and reconnect to clear the 
error condition. 
Replace the power supply.  
Yes 
If the external health LED is illuminated green, refer to Table 5-5. 
Note:
  For LED locations and functions, refer to Chapter 4, “Connectors, LEDs, and Switches.” For 
cabling configurations, refer to the HP ProLiant ML570 Generation 2 Server Setup and Installation 
Guide
HP ProLiant ML570 Generation 2 Server Maintenance and Service Guide 
5-5