Removal and Replacement Procedures 
6.  Disconnect all external peripheral devices from the server. 
7.  Place the server on a sturdy, level surface. 
Tower Server 
To power down the tower server: 
1.  Back up the server data. 
2.  Shut down the operating system as directed in the operating system instructions. 
3.  Open the front bezel. 
4.  Press the Power On/Standby button. 
 
 
WARNING:  Setting the server Power On/Standby button to the off position removes 
power from most areas of the server; this process may take 30 seconds. Portions of 
the power supply and some internal circuitry remain active until the AC power cord is 
disconnected. 
If the server has multiple power supplies installed, it is necessary to remove all power 
cords to remove all power from the system. 
 
Figure 2-4:  Pressing the Power On/Standby button (tower server) 
5.  Be sure that the system power LED on the front panel, near the Power On/Standby 
button, is amber and that the fan noise stops. 
6.  Disconnect all AC power cords from the AC outlets and then from the server. 
7.  Disconnect all external peripheral devices from the server. 
8.  Place the server on a sturdy, level surface. 
2-8  HP ProLiant ML370 Generation 3 Server Maintenance and Service Guide