64 Troubleshooting
Universal Serial Bus (USB) Specific Problems
Common 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 o and then turn on the
monitor again.
•Re-start the computer.
• Some USB devices like external
portable HDD require higher
electric current; connect the
device directly to the computer
system.
High Speed USB 3.0
interface is slow.
High Speed USB 3.0
peripherals working
slowly or not working
at all
•Check that your computer is
USB 3.0-capable.
•Some computers have both
USB 3.0 and 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).
•Re-start the computer.
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