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60 | 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
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 USB 3.0, 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.
Mobile High-Definition Link (MHL) Specific Problems
Specific
Symptoms
What You
Experience
Possible Solutions
MHL interface is
not working
Cannot see MHL
device image
shown on monitor
∞
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) 1 or HDMI (MHL) 2.
∞
Wait for 30 seconds after connecting MHL cable as
some MHL devices require longer recovery time.