65
Symptom
Troubleshooting Method
Check whether the screen entered the power off
mode due to no operation for an extended
period of time.
Check whether the input power supply is stable.
The colors of images are abnormal.
Check whether the HDMI cable is properly
connected or has any quality issue.
The touch function is abnormal or the
positioning is inaccurate.
Restart the screen.
In the Windows system, perform positioning
again. For details, see the section "Calibration".
The touch function is unavailable when
the external signal source channel is
being used.
Switch between different external signal
sources.
Ensure that the USB touch cable is connected to
the proper port. For details, see the section
"Ports".
Remove and insert the USB touch cable again.
There is no sound when the HDMI in
channel is used.
Remove and insert the HDMI cable again.
No image is displayed when the HDMI
out channel is used.
Generally, this issue is caused by the
compatibility of the external display product.
Replace the external display product and test
again.
The HDMI cable is too long or has a poor quality.
Replace the HDMI cable delivered with the
product.
The touch function on the front panel
is ineffective.
Touch the button using the fingertip completely.
Check whether the finger is wet or has other
liquids on it.
Restart the screen.
The USB flash memory cannot be
identified.
Check whether the USB flash memory is inserted
into the correct USB port. For details, see the
section "Ports".
The conference records cannot be
saved on the USB flash memory, and
the system prompts "The target
storage product has no write
permissions".
Format the USB flash memory to the FAT32
format.
The internal PC has no signal.
Check whether the internal PC is properly
inserted in the slot.
