Dell PowerEdge SC 420 - Manual (Page 19)

The front panel also incorporates two USB 2.0 connectors. See Figure 2 -1 .
Table 2-2. Diagnostic Indicator Codes
Green blinking The system is in a low power state. Check the diagnostic indicators to see if the specific problem is identified. See Table 2 -
2 .
Diskette drive Green blinking Indicates diskette-drive activity.
Hard drive Green blinking Indicates hard-drive activity.
Code Causes Corrective Action
A possible processor failure has
occurred. Reinstall the processor. See " Processor " in "Installing System Components" and restart the system.
Memory modules are detected,
but a memory failure has
occurred. Ensure that the memory modules are proper installed. See " Memory Module Installation Guidelines ."
Ensure that all the connector tabs are locked.
Remove and reinstall all memory modules. See " System Memory " in "Installing System Components."
Restart the system.
A possible expansion-card failure
has occurred. See " Troubleshooting Expansion Cards " in "Troubleshooting Your System."
If the problem persists, see " Getting Help ."
A possible video card failure has
occurred. Reinstall the video card and restart the system. See " Expansion Cards " in "Installing System
Components."
If the problem still exists, install a video card that you know works and restart the system.
If the problem persists, see " Getting Help ."
A possible diskette or hard-drive
failure has occurred. Check all the power and data cable connections. See " Troubleshooting a Diskette Drive " or the
appropriate hard-drive troubleshooting procedure (" Troubleshooting a SCSI Hard Drive " or
" Troubleshooting a SATA Hard Drive ") in "Troubleshooting Your System."
A possible USB failure has
occurred. Check cable connections, reinstall all USB devices, and restart the system.
No memory modules are
detected. Remove and reinstall all memory modules. See " System Memory " in "Installing System Components."
Ensure that the memory modules are proper installed. See " Memory Module Installation Guidelines ."
Ensure that all the connector tabs are locked.
Restart the system.
A system board failure has
occurred. See " Troubleshooting Expansion Cards " in "Troubleshooting Your System."
If the problem persists, see " Getting Help ."
A possible system board
resource and/or hardware failure
has occurred. See " Troubleshooting Expansion Cards " in "Troubleshooting Your System."
If the problem persists, see " Troubleshooting the System Battery ."
If the problem persists, see " Troubleshooting System Memory ."
If the problem persists, see " IRQ Assignment Conflicts " in "Finding Software Solutions."
If the problem persists, see " Getting Help ."
A possible expansion card failure
has occurred. See " Troubleshooting Expansion Cards " in "Troubleshooting Your System."
If the problem persists, see " IRQ Assignment Conflicts " in "Finding Software Solutions."
If the problem persists, see " Getting Help ."
Other failure has occurred. Ensure that the cables are properly connected from the diskette drive, hard drive, CD drive, and DVD drive
to the system board.
If the problem persists, see " Getting Help ."
The system is in a normal
operating condition after POST. None.