Hitachi Compute Rack 220H Getting Started Manual page 23

Handling of the system unit and peripherals
•
If you turn off the power switch during system startup or while in operation,
you may not be able to start up the system unit again. When this situation
happens, contact the sales representative or talk to the maintenance
personnel.
•
If you install the system unit at the proximity of other electronic devices,
interference may occur. Especially when a TV set or a radio is nearby,
electrical noise can be generated. When this situation happens, do the
following.
– Put the TV set or the radio away from the system unit.
– Change the direction of the antenna of the TV set or the radio.
– Use different electrical outlets.
•
A mouse is susceptible to exogenous electrical noise. When mouse
malfunction occurs, we recommend getting power for the system unit and
power for peripherals from the same OA tap with noise filter.
•
If foreign or other objects get inside an optical sensor of a mouse, remove the
objects. If this situation happens, a mouse cursor may not move smoothly.
•
"Wait more than 10 seconds to turn on the system unit after turning off the
system unit. If the AC supply to the system unit is shut down (for example, a
circuit breaker at a switchboard is shut off or AC power from the UPS is shut
off by a scheduling function of UPS), wait at least 30 seconds. For each case,
the system unit may not start up, if you turn on the system unit earlier.
•
For information about how to turn off the power, see
and follow the instruction."
•
If the system unit is used in a room with carpets or you use, for example, a
lap robe during operation of the system unit, static electricity can be
generated depending on the type of the material and can affect the system
unit and peripherals. Use the ones made of material that does not generate
too much static electricity.
•
Make sure the system unit does not hit anything when you move the system
unit.
•
The system unit and its internal devices need periodical maintenance. See
User's Guide and Appendix A Maintenance and supplies and follow the
instruction for maintenance.
•
During system startup, do not perform keyboard reset by pressing (Ctrl + Alt
+ Delete). System error occurs.
•
When you connect a USB device to the system unit, it may not be recognized
by the operating system (OS) because of loose connection.
In this case, remove and connect again a USB device.
Before installing
Hitachi Compute Rack 220H Getting Started Guide
Powering off system unit
1-3