Troubleshooting
28
ML23.8 User Manual, 99182A, April 2022
Single-Touch Resistive Touch Screen Models (HIS-ML23�8-FTVA)
Symptom
Causes
Solutions
No response
when touching
the touch
screen
Touch screen cable is not
plugged in correctly.
Make sure either the USB or Serial touch
screen cable is securely connected to the
monitor and PC� Do not connect both�
USB cable length exceeds 5
meters�
USB cables have a 5 meter limitation�
Exceeding this length may cause
connection issues without the use of a
USB or KVM Extender device. Please
contact Hope Industrial support for
extension options�
Serial connection in use, but
touch screen driver has not
been installed�
With a Serial connection, no touch will
be detected until the touch screen driver
is installed. See section "Installing the
Driver: Serial (RS-232) Connections"
above�
Serial connection in use,
but connection to computer
is not using the same port
for which the touch screen
driver is installed�
The Serial cable must be connected to
the computer's COM port prior to driver
installation to allow touch screen detection
and association with the correct COM
port. To fix, uninstall the driver, reboot
the computer, then follow instructions
in section "Installing the Driver: Serial
(RS-232) Connections" above� Be sure
to connect the touch screen serial port
before installing the driver.
The screen
responds to
touch, but does
not follow my
finger
Touch screen driver has
not been installed and the
touch screen has not been
calibrated�
Follow instructions for driver installation
and calibration in section "Single-Touch
Resistive Touch Screen Models" above.
Touch screen driver has
been installed, but the
touch screen has not been
calibrated�
Follow instructions for calibration in
section "Calibrate the Touch Screen
(Single-Touch Resistive Models Only)"
above�
