Troubleshooting The Video Subsystem; Troubleshooting A Usb Device; Troubleshooting A Serial Input And Output Device - Dell DSS 2500 Owner's Manual

Troubleshooting the video subsystem

1 Check the cable connections (power and display) to the monitor.
2 Check the video interface cabling from the system to the monitor.
3 Run the LCD Built-in Self Test (BIST).
If the tests run successfully, the problem is not related to video hardware.
Related link
Getting help

Troubleshooting a USB device

Prerequisite
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.
If the problem is not resolved, proceed 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.
Related links
Getting help
System Setup
System board jumper settings

Troubleshooting a serial input and output device

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 I/O serial device.
If the problem is resolved, replace the interface cable with a known working cable.
3 Turn off the system and the I/O serial device, and swap the serial device with a compatible device.
4 Turn on the system and the I/O serial device.
154 Troubleshooting your system