3-22 Sun Ultra 60 Service Manual • August 2001
3.6 Additional Keyboard ControlCommands
■Stop Key
If the diag-level is set to either max or min and the diag-level switch? variable
is set to true and POST is not to be executed when the system is powered on, press
and hold the keyboard Stop key and press the keyboard power-onkey.
Note – Press and hold the Stop key for approximately 5 seconds.
■Stop and N Keys
Toset the system NVRAM parameters to the original default settings, press and hold
the Stop and N keys before powering on the system. Continue to hold the Stop and
N keys until the system banner displays on the monitor.
3.7 System and Keyboard LEDs
The power light-emitting diode (LED), located at the chassis front, remains lighted
when the system is operating normally.FIGURE 1-2 shows the location of the power
LED.
While POST is executing and making progress, the Caps Lock key LED blinks while
the rest of the LEDs are off.If POST finds an error, a pattern is encoded in the LEDs
to indicate the defective part. If POST completes with no errors, all LEDs will be off
and the system will return to the OpenBoot PROM (OBP). TABLE3-2 defines the
keyboard LED patterns. FIGURE3-2 shows the location of the LED keys on the
keyboard.