What To Do - Sun Microsystems Enterprise 250 Owner's Manual

Caution - Removing the side access panel or removable media assembly activates
the system power interlock switches. This safety mechanism prevents all DC voltages
(except 5V standby power) from reaching any internal component when the side
panel or removable media assembly is removed and the front panel keyswitch is in
the Power-on position.

What to Do

1. Turn on power to any peripherals and external storage devices.
Read the documentation supplied with the device for specific instructions.
2. Turn on power to the monitor or terminal.
A terminal or monitor is required for viewing system messages. For setup
instructions, see "How to Attach an Alphanumeric Terminal" on page 50 or
"How to Configure a Local Graphics Console" on page 51.
3. Turn the front panel keyswitch to the Power-on position or to the Diagnostics
position.
See "About the Status and Control Panel" on page 6.
Use the Diagnostics position to run POST and OpenBoot Diagnostic tests to verify
that the system functions correctly with the new part(s) you have just installed.
For additional information, see Chapter 12.
4. When the system banner is displayed on the monitor or terminal, immediately
enter the Stop-a sequence on the Sun keyboard or press the Break key on the
terminal keyboard.
The system banner contains the Ethernet address and host ID. To enter the
Stop-a sequence, hold down the Stop key and press the a key.
Note - The system may take anywhere from 30 seconds to two minutes before
the system banner appears. This time depends on the level of power-on self-test
diagnostics being performed.
5. When the ok prompt is displayed, enter the following command:
ok boot -r
This command rebuilds the device trees for the system, incorporating any newly
installed options. After a device has been added to a device tree, it can be
Preparing to Install or Replace Parts
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