Users Guide

Troubleshooting your system
You can troubleshoot your system using indicators like diagnostic lights, and error messages during the operation of the device.
Topics:
• Power states and LED behavior
• Diagnostic power LED codes
• Power LED error code behavior
Power states and LED behavior
Table 16. Power states and LED behavior
States Behavior
Indicators
• Power LED: Bicolor, White / Amber
• Power state:
• S0–On: Power LED solid white
• S5 – Off: Power LED off
• Operation State:
• BIOS Post: Power LED solid white
• In OS: Power LED solid white
Power button control
• Force Off-state: Push and hold power button is >= 4 seconds
Diagnostic power LED codes
Table 17. Diagnostic power LED codes
Power LED light status Possible cause Troubleshooting steps
At first power apply: No LED light up briefly
Both power LED and activity LED come up
briefly and then turn off.
• Check AC power, call your utility
company.
• Check that AC power cord is plugged-
in.
• Check that DC plug is plugged into the
unit.
At first power apply: Both LEDs stay ON Both power LED and activity LED come up
briefly and then turn off.
• Logic board defect
• BIOS malfunctioning
• Abnormal power source
Push power button the LED does not turn • Power LED should come up in steady
Blue.
• Activity LED should turn on in steady
Amber.
• Logic board defect
• Power button defect
• Mechanical assembly misaligned; causes
miss actuation.
LED comes up normally but no display BIOS screen is displayed after few seconds. • Incompatible monitor
• Defect logic board
• Malfunction dongle (if used)
• Defect cable or connector
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58 Troubleshooting your system