Diagnostics
LED Diagnostic Indicators
The two front panel LEDs also function as diagnostic indicators, defined as follows.
Note: The cell colors indicate the color of the LED at that particular time.
|
Current System Operation |
Suspect Component |
System State |
Power LED |
Disk Activity LED |
Corrective Action |
|
Normal Operation |
N/A |
System ON |
ON |
OFF |
N/A |
|
Normal Operation |
N/A |
System ON with HDD Activity |
ON |
Flashing (HDD Access) |
N/A |
|
Normal Operation |
N/A |
Unit in Suspend (S3) |
Blinking (1/Sec) |
ON |
N/A |
|
• OFF • AC Present |
N/A |
•OFF •Not in Standby •External P/S ON |
OFF |
ON |
N/A |
|
•OFF •AC Present |
Power System |
•OFF •Not in Standby •External P/S ON |
OFF |
OFF |
1.Check AC power to P/S 2. Check P/S 3. Check connection between unit and P/S 4. Check power connection from Back Panel to Motherboard and Motherboard to Front Panel 5. Replace P/S 6. Replace Motherboard 7. Replace Front Panel Board |
|
Runtime |
Cooling Component/CPU |
Over Temperature |
Flashes red/green, then solid red as temperature increases |
N/A |
1.Check for blocked cooling vents 2. Check for excessive ambient temperature 3. Check cooling components |
|
POST |
CPU |
CPU not Operating |
ON |
ON |
1.Check for correctly installed CPU 2. Replace Motherboar |
|
POST |
BIOS Chip |
BIOS Checksum Failure |
ON |
Flashing (4/Sec)
|
1.Perform BIOS crisis recover 2. Replace BIOS chip 3. Replace Motherboard |
|
POST |
Memory |
Memory Issue |
ON |
Flashing (1/Sec) |
1.Check for properly installed memory 2. Replace memory 3. Replace Motherboard |
|
POST |
Motherboard |
No Display |
ON |
Flashing 1/4 Sec) |
Replace Motherboard |
|
POST |
Display Motherboard Peripheral |
Stopped Prior to Boot |
ON |
Flashing (1/Sec) |
No Display: 1.Check for power to display if no display 2. Check cable connection between Motherboard and display 3. Check for properly functioning display 4. Replace Motherboard Display Working: 1.Use display to determine failure point via onscreen message and BIOS Setup |
|
Boot Time |
Boot Media (HDD, LAN) |
|
ON |
OFF |
HDD is Boot Device: 1.Check HDD status in BIOS Setup 2. Check connections between HDD and Motherboard 3. Replace or re-image HDD 4. Replace Motherboard LAN is Boot Device: 1.Check for LAN link and activity LEDs on the Back Panel 2. Check LAN cable 3. Replace Motherboard |
