Chapter 2. Using the 44P Series Model 270This chapter provides information on how to start and use the system unit.Starting the System Unit1. Set the power switches of the attached devices to On.Note: When the system is plugged in but not powered on, the Power-On LEDflashes slowly.2. If the LED is not flashing and OK is not displayed, ensure that the power cord,located at the back of the system unit, is plugged into a grounded electrical outlet.3. If this does not solve the problem, go to “Chapter 8. Hardware ProblemDetermination” on page 149.4. Press the Power-On switch (1).When you press the Power-On switch (1), the Power-On LED (2) comes on, andthe system starts a POST (power-on self test).During POST, progress codes display in the operator panel display.5. If the Power-On LED does not come on and there is no indication of power whenyou press the Power-On switch, go to “Chapter 8. Hardware Problem Determination”on page 149.Stopping the System UnitAttention: When you use the shutdown procedure for your system, follow the correctshutdown procedure before you stop the system unit. Failure to do so canresult in the loss of data. The System unit is powered down by theshutdown procedure.1. At a command line, type shutdown to stop the operating system.2. After you shut down the operating system, set the power switches of any attacheddevices to Off.3. If you will be servicing the system unit, unplug the system-unit power cable from theelectrical outlet.127
