Troubleshooting A Usb Device; Troubleshooting A Serial I/O Device - Dell DSS 1510 Owner's Manual

2. Check the video interface cabling from the system to the monitor.
3. Run the appropriate diagnostic test.
Results
If the tests run successfully, the problem is not related to video hardware.
Next steps
If the tests fail, see the Getting help section.
Related reference
Getting help

Troubleshooting a USB device

Prerequisites
NOTE: Follow steps 1 to 6 to troubleshoot a USB keyboard or mouse. For other USB devices, go to step 7.
Steps
1. Disconnect the keyboard and/or mouse cables from the system and reconnect them.
2. If the problem persists, connect the keyboard and/or mouse to another USB port on the system.
3. If the problem is resolved, restart the system, enter System Setup, and check if the non-functioning USB ports are enabled.
NOTE: Older operating systems may not support USB 3.0.
4. Check if USB 3.0 is enabled in System Setup. If enabled, disable it and see if the issue is resolved.
5. If the problem is not resolved, replace the keyboard and/or mouse with a known working keyboard or mouse.
If the problem is not resolved, proceed to step 7 to troubleshoot other USB devices attached to the system.
6. Turn off all attached USB devices, and disconnect them from the system.
7. Restart the system.
8. If your keyboard is functioning, enter System Setup, verify that all USB ports are enabled on the Integrated Devices screen. If your
keyboard is not functioning, use remote access to enable or disable the USB options.
9. Check if USB 3.0 is enabled in System Setup. If it is enabled, disable it and restart your system.
10. If the system is not accessible, reset the NVRAM_CLR jumper inside your system and restore the BIOS to the default settings. See
the System board jumper setting section
11. Reconnect and turn on each USB device one at a time.
12. If a USB device causes the same problem, turn off the device, replace the USB cable with a known good cable, and turn on the device.
Next steps
If all troubleshooting fails, see the Getting help section.
Related reference
Getting help
System Setup
System board jumper settings

Troubleshooting a serial I/O device

Steps
1. Turn off the system and any peripheral devices connected to the serial port.
2. Swap the serial interface cable with a known working cable, and turn on the system and the serial device.
Troubleshooting your system 127