Sun Microsystems Ultra 5, Руководство по обслуживанию

Страница: 67 / 258

Chapter 3 Power-On Self-Test 3-19
3.4.3 POST Progress and Error Reporting
When POST is initialized, the Caps Lock key on the Sun Type-5 or Type-6 keyboard
flashes on and off to indicate that POST is active (see
FIGURE 3-2
or
FIGURE 3-3
).
Additional POST progress indications are also visible when a TTY-type terminal or a
TIP line is connected between serial port A (default port) of the tested system and a
second Sun workstation.
If an error occurs during POST execution, the keyboard Caps Lock key indicator
stops flashing and an error code pattern is indicated using the Caps Lock, Compose,
Scroll Lock, and Num Lock key indicators (see
FIGURE 3-2
or
FIGURE 3-3
). The error
code pattern indicates a particular system hardware failure. If a keyboard error code
pattern is displayed, determine the meaning of the pattern by using
TABLE 3-1
.
Note – An error code might be visible for only a few seconds. Observe the Caps
Lock, Compose, Scroll Lock, and Num Lock key indicators closely while POST is
active.
In most cases, POST also attempts to send a failure message to the POST monitoring
system.
CODE EXAMPLE 3-3
shows the typical appearance of an error message.
TABLE 3-1
Keyboard LED Error Indication Patterns
Caps Lock Compose Scroll Lock Num Lock Bit Value Meaning of Pattern
Blink Off Off Off x000(2) POST in progress
Off Off Off Off 0000(2) POST successfully completed
On Off Off On 1001(2) System board failed
On Off On Off 1010(2) No memory found
On Off On On 1011(2) Reserved
On On Off Off 1100(2) Reserved
On On Off On 1101(2) Reserved
On On On Off 1110(2) Bad CPU
On On On On 1111(2) Reserved