It's easier if you've got an Android head unit. Even if the screen is completely unresponsive, it's possible to perform the task using a USB keyboard. A hard factory reset will solve any software-related problem and fix the calibration as well. So, this should help with car stereo touch screen repair. There are some instances in which even minute scratches can result in a faulty touch screen. So, you should avoid using sharp objects on your car stereo touch screen. Liquid or water damage can also lead to an unresponsive head unit screen. This should restart the software from scratch. If a single reset does not work, try removing the fuse for the head unit power for a minute to do a full power cycle reset. Check for any updates available and update the touchscreen driver/firmware to the latest versions from the manufacturer. Open the Kia Carnival's doors and windows as the head unit are drying for the added ventilation. Check the touch screen stereo or infotainment system if it works after it dries. If it doesn't function, it might be time to swap out the broken head unit with a new model. How Do You Reset The Screen On A Kia Carnival? It can happen due to several reasons. For instance, if the screen has lost its calibration, it won't respond as expected as it won't be able to register the touch pressure correctly. The build-up of dirt and dust can also cause the touchscreen to be unresponsive. If you do not clean regularly, these filths can even damage the component for good! 3i6JFC.

head unit touch screen not working