52 | Troubleshooting
Universal Serial Bus (USB) Specific Problems
Specific
Symptoms
What You
Experience
Possible Solutions
USB interface is
not working
USB peripherals
are not working
•Check that your monitor is turned on.
•Reconnect the upstream cable to your computer.
•Reconnect the USB peripherals (downstream connector).
•Switch off and then turn on the monitor again.
•Reboot the computer.
•Some USB devices like external portable HDD require higher
electric current; connect the device directly to the
computer system.
High Speed
USB 2.0
interface is
slow
High Speed USB
2.0 peripherals
working slowly or
not working at all
•Check that your computer is USB 2.0-capable.
•Some computers have both USB 2.0 and USB 1.1 ports.
Ensure that the correct USB port is used.
•Reconnect the upstream cable to your computer.
•Reconnect the USB peripherals (downstream connector).
•Reboot the computer.