KRC4 badly touchscreen

Hello, I am using a kuka kr2100 r 2700 extra robot with kss8.2.20. There was a problem in the smartpad, the touchscreen at the bottom of the screen responds very badly. Calibrating the touchscreen sometimes helps for 5-10 minutes, then the sensor does not work well.

To eliminate this problem, I wanted to change the touchscreen. Did anyone have a positive experience in this matter?

While searching and waiting for delivery, I wanted to use an usb mouse to control the smartpad, can you tell me the correct connection to the smartpad? The last time I used the mouse, my smartpad firmware flashed, I don’t know this coincidence, or the mouse influenced it, I would not want to destroy the firmware again.

Thanks for the help

Quote from panic mode

yes, couple of times... KUKA repair center makes sure they are repaired and working correctly

Service center in my country replied that they can flash or replace with a new smartpad, unfortunately they do not carry out partial repairs. I wanted to know if anyone had done this.

Using a USB mouse can ruin your Smartpad? I connect the mouse to the Smartpad, then start the controller, is this normal?