6 Power On and Off



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Powering Off the System                      page 6-1
                                             
Restarting the System While Troubleshooting  page 6-2
                                             
Reading Boot Messages                        page 6-3

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6.1 Powering Off the System

Before turning off system power, shut down the operating system. Failure to shut down the operating system can result in loss of data.

    1. Notify users that the system is going down.
    2. Back up the system files and data.
    3. Shut down the system.
    4. Turn the power switch off (O position) at the left rear of the system.

    The LED on the front of the system should not be lit and the fans should not be running.

Warning -

When system power is in the off position, and the AC power cord remains connected to a power outlet, hazardous AC voltage is still present in the power supply primary.

You must disconnect the AC power cord prior to handling the power supply. When servicing any other system component, the AC power cord should remain connected.
    5. Turn the power to the monitor off.
    6. Disconnect any cables directly connected to the computer system.

    Pull the connectors out carefully.

6.2 Restarting the System While Troubleshooting

To restart the system when the system is operating normally, see the section Section 6.3, "Powering On the System" later in this chapter.

    1. If you are troubleshooting a problem and need to view POST power-on messages, connect a terminal to serial port A or set up a tip connection to another workstation.

    POST power-on messages are displayed on a terminal or the tip window you set up. To set up a tip connection to another workstation, see Section 3.3.1, "Setting Up a tip Connection to Another Workstation."

    2. Turn the power on (| position) in this order:
      a. SCSI peripherals connected to the system

      SCSI peripheral farthest from the system (the peripheral with the SCSI terminator attached.)

      SCSI peripheral closest to the system (the peripheral directly connected to the system.)

      Other peripherals, such as printers

      b. Terminal (or graphics monitor if tip connection is used)
      c. System unit
    3. Start POST diagnostic mode by pressing and holding the Stop (L1-d) keys.
    4. Watch the screen for any POST error messages.

At the conclusion of testing, the Open Boot PROM automatically configures the system and may omit any devices that have failed diagnostics. After automatic configuration, the system may halt with an error message indicating the failing system component.

Note - POST does not test drives or internal parts of SBus cards. To test these devices, run Open Boot PROM diagnostics after the system has booted. See Section E.1, "Selected On-Board Diagnostic Tests" in Appendix E for a description of how to use the test command to test SBus cards and drives. See also to the manual OpenBoot Command Reference.

6.3 Powering On the System

To power on the system when the system is operating normally:

    1. Turn the power switch on to all peripherals connected to the system.

    It is necessary to turn power on to the attached peripherals first so the system will recognize the peripherals when the system is powered on.

    2. Turn the power switch on to the monitor.
    3. Turn the power switch on to the system.

6.4 Reading Boot Messages

After POST completes the system self-test, a message similar to the following appears, listing hardware detected in the system. 

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<<<< SPARCstation 10 POST V4.1 >>
	...(various test messages)...
SPARCstation 10 Series (2 X XXXXXX)
ROM Rev. -.-, --- MB Memory installed, Serial #---.
Ethernet address -:-:--:-:--:--, Host ID: ------.

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