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62 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.
•Re-connect the upstream cable
to your computer.
•Re-connect the USB
peripherals (downstream
connector)
•Switch o and then turn on the
monitor again.
•Re-boot the computer.
• Some USB devices like external
portable HDD require higher
electric current; connect the
device directly to the computer
system.
Super Speed USB 3.0
interface is slow.
Super 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 ports.
Ensure that the correct USB
port is used.
•Re-connect the upstream cable
to your computer.
•Re-connect the USB
peripherals (downstream
connector).
•Re-boot the computer
Mobile High-Definition Link (MHL) Specific Problems
Common Symptoms What You
Experience
Possible Solutions
MHL interface is not
working.
Cannot see MHL
device image shown
on monitor.
•Re-connect the upstream cable
Ensure your MHL cable and
MHL device are MHL certified.
•Check your MHL device is
turned On.
•Check your MHL device is not
in Standby mode.
•Check physical MHL cable
connection is corresponding to
input source selected on OSD
Menu i.e., HDMI (MHL) .
•Wait for 30 seconds after
connecting MHL cable as some
MHL devices require longer
recovery time.