How to Internally Inspect the Server

1. Choose a method for shutting down the server from main power mode to standby power mode.

   • Graceful shutdown: Press and release the Power button on the front panel. This causes Advanced Configuration and Power Interface (ACPI)-enabled operating systems to perform an orderly shutdown of the operating system. Servers not running ACPI-enabled operating systems will shut down to standby power mode immediately.

   • Emergency shutdown: Press and hold the Power button for four seconds to force main power off and enter standby power mode.

     When main power is off, the LED is not lit.

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     Caution - When you use the Power button to enter standby power mode, power is still directed to the service processor board and power supply fans, indicated when the Power/OK LED is flashing. To completely power off the server, you must disconnect the AC power cords from the back panel of the server.

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   See the following illustration for the location of the Power button.

   
   
   

   Label Description 1 Power OK LED 2 Power button

2. Remove one of the CPU modules from the chassis.

   For instructions on removing the CPU module, refer to the Sun Fire X4800 Server Service Manual.

3. Inspect the internal status indicator LEDs, which can indicate component malfunction.

   For the LED locations and descriptions of their behavior, see Troubleshooting DIMM Problems.

4. Verify that there are no loose or improperly seated components.
5. Verify that all cable connectors inside the system are firmly and correctly attached to their appropriate connectors.
6. Verify that any after-factory components are qualified and supported.

   For a list of supported PCI cards and DIMMs, refer to the Sun Fire X4800 Server Service Manual.

7. Check that the installed DIMMs comply with the supported DIMM population rules and configurations, as described in Troubleshooting DIMM Problems.
8. Reinstall the CPU module into the server chassis.
9. Repeat Step 2 through Step 8 for each CPU module that needs to be inspected.
10. To restore main power mode to the chassis, (all components powered on), press and release the Power button on the server front panel.

    When main power is applied to the full server, the Power/OK LED next to the Power button blinks intermittently till BIOS POST finishes.

11. If the problem with the server is not evident, you can try viewing the power-on self-test (POST) messages and BIOS event logs during system startup.

    Refer to the Sun Fire X4800 Server Service Manual for more information about POST and BIOS event logs.