Dell POWEREDGE C6105 - Manual (Page 184)

184 | Troubleshooting Your System
 If the system does not power on, check the LED display. If the power
LED is not on, you may not be receiving AC power. Check the AC
power cord to make sure that it is securely connected.
Troubleshooting System Startup Failure
If your system halts during startup, especially after installing an operating
system or reconfiguring your system‘s hardware, check for invalid memory
configurations. These could cause the system to halt at startup without any
video output. See "System Memory" on page 131.
For all other startup issues, note any system messages that appear onscreen.
See "Using the System Setup Program‖ on page 37 for more information.
Troubleshooting External Connections
Ensure that all external cables are securely attached to the external
connectors on your system before troubleshooting any external devices. See
Figure 1-1, Figure 1-3, and Figure 1-6 for the front- and back-panel
connectors on your system.
Troubleshooting the Video Subsystem
1 Check the system and power connections to the monitor.
2 Check the video interface cabling from the system to the monitor.
Troubleshooting a USB Device
Use the following steps to troubleshoot a USB keyboard and/or mouse.
For other USB devices, go to step 5.
1 Disconnect the keyboard and mouse cables from the system briefly and
reconnect them.