Sun Enterprise 3500 System Installation Guide

Powering On the System

Note -

It is advisable to connect an ASCII terminal to the system during installation. See "Connecting an ASCII Terminal" for terminal settings and connections. Observe the yellow (middle) LED on the front panel. It should go off when the boot process completes. If it remains lit, observe the terminal screen for boot messages produced by the firmware diagnostic program during power on.

To power on the Enterprise 3500 system:

  1. Begin with a safety inspection of the system.

    1. Use the key provided to unlock and open the system front door.

    2. Turn the system key switch to the Standby position. See Figure 3-1.

    3. Turn the AC power sequencer power switch to Off.

      The AC power sequencer is at the rear of the enclosure. See Figure 3-2.

    4. Verify that the AC power cord is plugged into a wall socket.

      Caution - Caution -

      Do not disconnect the power cord from the wall socket when working on the server. This connection provides a ground path that prevents damage from uncontrolled electrostatic discharge.

  2. Turn on power to any expansion cabinets.

    Read the documentation supplied with each type of expansion cabinet for specific instructions.

  3. Turn on the terminal (if applicable).

  4. Turn the AC power sequencer power switch to On. See Figure 3-2.

  5. Turn the key switch to the On position. See Figure 3-1.

    You should see and hear several things happen:

    Figure 3-1 Key Switch Positions


    • The fans in the power supplies begin turning.

    • The left front panel LED (green) turns on immediately denoting that the power supply is delivering DC power.

    • The middle front panel LED (yellow) flashes while POST runs for approximately 60 seconds. After 60 seconds, this LED turns off if the tests pass. If the LED remains lit after 60 seconds, a test has failed.

    • The right front panel LED (green) flashes to show that boot is successful and the operating system is running. If this LED fails to turn on and the middle LED is on, a severe hardware fault exists.

    Caution - Caution -

    Never move the system when the power is on. Failure to heed this warning may result in catastrophic disk drive failure. Always power the system off before moving it.

    Figure 3-2 AC Power and Clock+ Board


  6. Watch the terminal screen for error messages from the firmware diagnostic program.

    POST (power-on-self-test) tests subassemblies and some interface paths between subassemblies.

    At the conclusion of testing, firmware automatically attempts to reconfigure the system, omitting any parts of the system that have failed diagnostics.

    If there are no faults, or if firmware completes a successful reconfiguration in response to detected faults, the system boots.

    Note -

    If faulty parts are detected and configured out of the working system, you and the system manager must decide whether to operate the system until replacement parts arrive, or to halt operation. Also, if a faulty component cannot be replaced in the field, the entire subassembly (like the system board) must be replaced.

  7. To restart firmware, or if the system hangs, press the CPU reset switch on the clock+ board. See Figure 3-3.

    Figure 3-3 CPU Reset Switch on Clock+ Board


Reading Boot Messages

Use the boot software messages to verify that all options are installed and recognized by the system. After firmware completes the system self-test, a message similar to the following will appear on your screen. The message lists hardware detected in the system.

Note -

This screen display is an example only. The actual message displayed on the screen will depend on the software running on your system.

5-slot Sun Enterprise 3500, Keyboard Present
OpenBoot -.- FCS, --- MB memory installed, Serial #---.
Ethernet address -:-:--:-:--:--, Host ID: ------.

If firmware indicates a hardware problem at this time, refer to the "Troubleshooting" section in the Sun Enterprise 3500 System Reference Manual for further instructions.

Boot the system using the procedure that is appropriate for your operating system. See the Preface "UNIX Commands," for a reference to documentation that describes this procedure.

Interpreting Status LED Patterns

If there is no terminal on the system, basic system status information is available on the front panel LEDs, as shown in Figure 3-4.

Figure 3-4 System Status LED


Note -

The system is in OBP if the left LED is on (green), the middle LED is flashing (yellow), and the right LED is off.

After the boot process completes, check the status of the system by inspecting system status LEDs on the front panel. See Figure 3-4 and Table 3-1, which summarize LED status indications.

Table 3-1 Front Panel LED System Status

LED Position 


Left LED (green) 

On -- the power supply is delivering DC power 

Middle LED (yellow) 

On flashing -- (first 60 seconds of AC power) self tests are running 

Off -- (after self tests end) no hardware failures detected 

On -- (after self tests end) hardware failure was detected 

Right LED (green) 

Off -- (first 60 seconds of AC power) self tests are running 

On flashing -- (after self tests end) system is running 

Off -- (after self tests end) system cannot run; repair is needed 

Ideally, when the self-test completes, both left and right LEDs are on. Less ideal is if all LEDs are on (system needs service, but is able to run). The worst condition is if the left and middle LEDs are on (system cannot boot), or if no LED is on.