Power-On Tests; Table 6-1 Troubleshooting Symptoms And Probable Causes - Silicon Graphics IRIS Indigo Owner's Manual

Chapter 6: Troubleshooting
112

Power-On Tests

Table 6-1 briefly lists symptoms and probable causes during power-on diagnostics.
Table 6-1 Troubleshooting Symptoms and Probable Causes
Symptom
No LED
Solid amber LED
Flashing amber LED
No boot tune
Solid green LED
No LED on system
disk
Diagnostic error
messages, no login
icons
System State
No power to unit
Memory diagnostic
failure
No audio
System menu displayed
on booting up
No system boot
Diagnostic failure
No graphics
Cause
Power supply failure—
check rear of unit for fan
operation. Check
system disk (green LED
should flash during
power-on). Possible
CPU failure.
CPU board or graphics
board failure.
SIMM failure. Check
error messages for
faulty SIMM.
Faulty speaker. Faulty
CPU board. Volume set
too low or to zero.
Diagnostics successful.
Drive not all the way
into slot—check drive.
Drive failure—see your
site administrator.
CPU failure. Graphics
board failure. Monitor
failure.