Silicon Graphics Tezro, Hardware User'S Manual

Page: 136 / 174

114 007-4564-001
4: Troubleshooting and Diagnostics
Troubleshooting
This section covers the following topics:
• “Environmental Fault Monitoring” on page 114
• “Bezel LEDs” on page 114
Environmental Fault Monitoring
The workstation monitors its environment to ensure proper operation. It will
automatically power off if any of the following faults are found:
• Any fan spins at less than 80% of nominal speed.
• Any temperature sensor registers 158
°
F (70
°
C) or above.
• Any voltage r/- 20% of nominal.
If your workstation is powering off unexpectedly, check for these conditions.
Bezel LEDs
The LEDs in the workstation bezel can provide important troubleshooting information.
Table 4-1 shows a list of LED signals and what they mean.
Table 4-1 Bezel LED Signals
LED Signal Explanation
Blinking White Power button pressed (On or Off)
Solid white Successful PROM boot/ OS running
Solid yellow L1 has detected a problem. Check the L1
display for more information
Blinking red General system failure
Check the L1 display for more information
Solid red System node board failure
(failed to read PROM at power on)