Sun Microsystems SPARCstation 4 110 Service Manual page 39

Caps Lock LED
(UNIX keyboard)
Sun Compact 1 Keyboard
FIGURE 3-3
If the system fails any POST, one of the LEDs will light to indicate the nature of the
problem. The LED may be lit continuously, or for just a few seconds.
provides the meaning of each diagnostic LED.
Interpreting the Keyboard Diagnostic LEDs
TABLE 3-1
Diagnostic LED
Num Lock LED is lit.
Scroll Lock LED is lit.
Compose LED is lit.
Note – The Caps Lock LED is not used as a failure indicator; it blinks on and off to
indicate that the POSTs are running. The keyboard LED diagnostics feature
described here applies only to systems with a Sun™ Type-4, Type-5, or Compact 1
keyboard connected to its keyboard port. The LED diagnostics do not apply if a
different Sun-supported keyboard is connected to the keyboard port, or if a terminal
and its keyboard are used as a main console instead of a monitor and a Type-4, Type-
5, or Compact 1 keyboard.
Caps Lock LED
(U.S. keyboard)
Failed Part
Main logic board
NVRAM
DSIMMs (see Section 4.4 "Determining Faulty
DSIMM Locations" on page 4-7)
Chapter 3
Scroll Lock
LED
Compose Num Lock
LED
TABLE 3-1
Power-On Self-Test (POST)
LED
3-3