HP ML150 HP ProLiant ML150 G6 Server Maintenance and Service Guide - Page 27

Powering down the server, System covers

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1. Make sure that you install all components according to the described step-by-step instructions. 2. Make sure not to leave loose tools or parts inside the server. 3. Reinstall any expansion board(s), peripheral(s), board cover(s), and system cable(s) that have previously been removed. 4. Reinstall the system covers. 5. Connect all external cables and the AC power cord to the system. 6. Press the power button on the front panel to turn on the server. CAUTION: Do not operate the server for more than 10 minutes with the access panel and drives removed. Otherwise, improper cooling airflow may damage system components. Powering down the server To power down the server: 1. Shut down server as directed by the operating system documentation. 2. If necessary, press and hold the power button until the server shuts off. 3. Disconnect the AC power cord(s) from the AC outlet(s) and then disconnect the cord(s) from the server. 4. Be sure that the power LED indicator is turned off and that the fan noise has stopped. 5. Disconnect all external peripheral devices from the server. WARNING: To completely remove all power from the system, disconnect all power cords from server. WARNING: Hazardous voltages are present inside the server. Always disconnect AC power from the server and other associated assemblies while working inside the unit. Serious injury may result if this warning is not observed. WARNING: To reduce the risk of injury from electric shock, disconnect all power cords to completely remove power from the system. WARNING: To reduce the risk of personal injury from hot surfaces, allow the internal system components to cool before touching them. CAUTION: Protect the server from power fluctuations and temporary interruptions with a regulating uninterruptible power supply (UPS). This device protects the hardware from damage caused by power surges and voltage spikes, and keeps the system in operation during a power failure. CAUTION: The server must always be operated with the system covers on. Proper cooling is not achieved when the system covers are removed. System covers The access panel and the front bezel are both detachable. Both system covers must be removed and detached before removing or replacing non-hot-plug components. Servers configured with hot-plug drives require only the front bezel to be removed to remove and replace hot-plug drives. Removal and replacement procedures 27

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1.
Make sure that you install all components according to the described step-by-step instructions.
2.
Make sure not to leave loose tools or parts inside the server.
3.
Reinstall any expansion board(s), peripheral(s), board cover(s), and system cable(s) that have
previously been removed.
4.
Reinstall the system covers.
5.
Connect all external cables and the AC power cord to the system.
6.
Press the power button on the front panel to turn on the server.
CAUTION:
Do not operate the server for more than 10 minutes with the access panel and drives
removed. Otherwise, improper cooling airflow may damage system components.
Powering down the server
To power down the server:
1.
Shut down server as directed by the operating system documentation.
2.
If necessary, press and hold the power button until the server shuts off.
3.
Disconnect the AC power cord(s) from the AC outlet(s) and then disconnect the cord(s) from the
server.
4.
Be sure that the power LED indicator is turned off and that the fan noise has stopped.
5.
Disconnect all external peripheral devices from the server.
WARNING:
To completely remove all power from the system, disconnect all power cords from
server.
WARNING:
Hazardous voltages are present inside the server. Always disconnect AC power from
the server and other associated assemblies while working inside the unit. Serious injury may result if
this warning is not observed.
WARNING:
To reduce the risk of injury from electric shock, disconnect all power cords to
completely remove power from the system.
WARNING:
To reduce the risk of personal injury from hot surfaces, allow the internal system
components to cool before touching them.
CAUTION:
Protect the server from power fluctuations and temporary interruptions with a regulating
uninterruptible power supply (UPS). This device protects the hardware from damage caused by
power surges and voltage spikes, and keeps the system in operation during a power failure.
CAUTION:
The server must always be operated with the system covers on. Proper cooling is not
achieved when the system covers are removed.
System covers
The access panel and the front bezel are both detachable. Both system covers must be removed and
detached before removing or replacing non-hot-plug components. Servers configured with hot-plug
drives require only the front bezel to be removed to remove and replace hot-plug drives.
Removal and replacement procedures
27