Tutors have notified us that when they write on this board; they get these short horizontal lines, please see photo.
Here is the info you requested:
model no AP4-55
the usb is connected via a faceplate on the wall, the usb cable is about a meter long. The tutor said that regardless whether they use finger or stylus, it has the same effect. Please see attached photo. I have not tried the visual view yet.
Sorry this board is version 4 not 5; does it have visual view functionality? I thought only version 5 and above have it.