So this may sound very unusual but i think my PC is damaging my keyboard. So every keyboard i connect to my pc stops working. By stops working i mean few set of keys alone dont work. I was curious as to why and wanted to try n fix it. So i took my keyboards apart. I found that in all the keyboard. The first connection point of the contact sheet is not working ( I have attached pictures of what i mean ). Any idea as to why this is happening?