Acer C731 keyboard problem.
I have several Acer C731 Chromebooks and each of one is having one type of keyboard problem of two problems. 1. type problem is that letters N- and B- don't work and the second problem is that 2,W,S and X-letter don't work. I have tried powerwash and sort of like that, reinstalling Chromeos etc. If I reinstall the keyboard wire, it may help for a moment, but not permanently. I have noticed that, if I replace working keyboard to not working keyboard, keys will work normally. But those Chromebooks have Finnish keyboards, which have letters Ä and Ö, so I need that kind of keyboards, but them don't exist. I can't find any of them. Any ideas what to do? I have about 30 Acer C731 Chromebooks and every Chrome is having the same problem.