How to fix the touch screen if it is not working (Touch screen monitor)

If the monitor is on and is recognized by the computer, i.e. you can see the desktop icons, but the touch doesn't work, it is possible that the USB cable or the Serial cable is not good (bent) or improperly connected to the computer (laptop). Make sure that the USB cable or serial cable are tightly connected in a working USB or serial port.

This is how a serial cable looks like:

If the touch screen monitor has Serial and USB ports and doesn't work when connected via the USB port, connect it through the Serial port and vice versa (if it was connected through the Serial port, connect it through the USB port).

If this solution didn't work, see the other solutions.

If the monitor's USB and/or Serial ports are dirty, the computer won't be able to recognize the touch screen gestures. You can clean the ports by vacuuming the dust lumps out with a vacuum cleaner, whose suction power should be set to minimum. You can also use a toothpick to clean the ports, but you need to be very gentle as the ports are fragile.

Turn off the monitor and turn it back on after a minute or two. You can also try unplugging the power cord of the monitor while the monitor is on, but unplug the cable from the wall socket's side, not from the monitor's.