Troubleshooting
7210 SAS-M Installation Guide Page 71
Power and Cooling Problems 
If the power indicator does not turn on when the power cord is plugged in, you may 
have a problem with your power outlet, power cord, or internal power supply. 
However, if the unit powers off after running for a while, check for loose power 
connections, power losses or surges at the power outlet, and verify that the fans on the 
unit are unobstructed and running prior to shutdown.