Sun Microsystems SPARCstation 5 User Manual

3-2 SPARCstation 5 Service Manual—November 1996
3
The POST comprises a sequence of tests designed to evaluate the major
hardware components of the main logic board in the short time before the
OpenBoot PROM firmware takes control. The POST does not perform
extensive testing on any component of the main logic board. Only major
failures can be detected by the POST.
Four different LEDs on the keyboards are used to indicate the progress and
results of the POST. These LEDs are on the Caps Lock, Compose, Scroll Lock,
and Num Lock keys, as shown in Figure 3-1, Figure 3-2, and Figure 3-3. To
indicate the beginning of the POSTs, the four LEDs briefly light all at once. The
monitor screen remains blank, and the Caps Lock LED blinks for the duration
of the POST.
Figure 3-1 Arrangement of Sun Type-5 Keyboard Diagnostic LEDs
Num Lock
LED
Caps Lock LED
(U.S. keyboard)
Compose
LED
Scroll Lock
LED
Caps Lock LED
(UNIX keyboard)

Sun Microsystems SPARCstation 5 Specifications

General

Brand	Sun Microsystems
Model	SPARCstation 5
Category	Desktop
Language	English