Hello, in your case there would be 3 possible problems: 1. Touch damaged by time, it is solved by replacing a new one. 2. The female and male connectors of the touch and plate are sulphated, this is solved by cleaning with isopropyl alcohol and a disused toothbrush, also check if the pins that are welded did not suffer fractures or are black, if so clean with a needle and with a good pulse captive touch up those welds. 3. Software problems, in this case it was necessary to reinstall software either by a special program that some companies provide, this would have to be checked on your official website, usually called software update or suite. You only have to try each method to see which one works, check first 2, then 3 and finally 1. Greetings, I hope and serve you.