Touchscreen Problems; Universal Serial Bus (Usb) Specific Problems - Dell C8621QT User Manual

Touchscreen Problems

Specific
Symptoms
Touch report
error
Touchscreen
non-responsive in
power-save mode

Universal Serial Bus (USB) Specific Problems

Specific
Symptoms
USB interface is
not working
SuperSpeed USB
3.1 interface is
slow.
62 | Troubleshooting
What You Possible Solutions
Experience
• Use the Dell provided USB cable to connect your
• Make sure the power cable has a ground pin.
Touch function • Unplug and replug the power cable to allow
miss alignment or
no touch function
• Make sure computer supports USB 2.0 or later.
• If the display cannot be detected by the computer,
• Access Device Manager, expand HID Interface Device
Cannot wake
up display and
• Right click HID- compliant device, click Properties and
computer by
using touch in
power-save mode
• Check Display OSD 'Wake on touch' setting is enabled.
What You Possible Solutions
Experience
USB peripherals • Check that your display is turned ON.
are not working • Reconnect the upstream cable to your computer.
• Reconnect the USB peripherals (downstream
• Switch off and then turn on the display again.
• Reboot the computer.
• Some USB devices like external portable HDD require
SuperSpeed USB • Check that your computer is USB 3.1-capable.
3.1 peripherals • Some computers have USB 3.1, USB 3.0, USB 2.0,
working slowly or
not working at all
• Reconnect the upstream cable to your computer.
• Reconnect the USB peripherals (downstream
• Reboot the computer.
computer.
initialization of the touch module.
power off/on the monitor or unplug and replug the
USB cable.
under Human Device.
select the check-box to allow the device to wake the
computer.
connector).
higher electric current; connect the device directly to
the computer system.
and USB 1.1 ports. Ensure that the correct USB port
is used.
connector).