Sun Microsystems 6500 Installation Manual page 51

6. Turn the key switch to the On position.
The system will run firmware diagnostics for about one minute and then boot.
You should see and hear several things happen:
The fans in the power supplies begin turning.
The left LED (green) on the front of the cabinet turns on immediately to indicate
the DC power supply is functioning.
The middle LED (yellow) begins flashing.
The right LED (green) flashes after firmware completes to denote that the
operating system is running.
The terminal screen lights up upon completion of the internal self-test.
7. Watch the terminal screen for any firmware error messages.
Note – If the middle front panel LED remains lit after the system has booted,
firmware has found (and deconfigured) failing hardware in the main cabinet.
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.
If the system is unable to communicate with the network, see Section 3.4 "Failure of
Network Communications."
Note – POST does not test drives or internal parts of SBus cards. To test these
devices, run OpenBoot PROM (OBP) diagnostics manually after the system has
booted. Refer to the OpenBoot Command Reference for instructions.
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.
8. To restart firmware, or if the system hangs, press the CPU reset switch on the
clock+ board (
FIGURE 3-3
).
Chapter 3 Powering the System On and Off 3-5