3 - 10 HS70A Service Manual
Shutting Down the System
Press the On/Off button while using the system to initiate shutdown.
CAUTION
Pressing the On/Off button for longer than five seconds will
immediately turn the power off and may damage the hard disk; do
not turn off the power by using this method unless absolutely
necessary.
To ensure that the product is safely cut off from electrical power, set
the power switch at the rear of the product to Off position after using
the product.