Sun Microsystems 5500, Reference Manual

Page: 161 / 304

Chapter 10 Flow Diagrams for Troubleshooting 10-9
10.8 Defective Clock+ Board
There is one clock+ board in the system.
Caution –
The clock+ board is not hot-pluggable. You must halt the operating
system and turn off AC power before replacing the clock+ board.
FIGURE 10-8
Diagnosing a Defective Clock+ Board
INDICATION
System will not boot
Clock+ board yellow “service”
LED does not light during
POST or remains lighted
after POST
System and board LEDs do not
flash, or fail POST
repeatedly with random
LED patterns
TTY port A does not respond
Begin
End
TEST/PROCEDURE
Examine LED displays.
Check clock+ board.
Check clock+ board and power
supplies.
Check settings for the port.
Replace peripheral power supply.
REFERENCE
See
TABLE 9-1
.
See
FIGURE 10-7
.
Section 9.1 “Using a
Terminal.”