Gemibook keyboard problem

suddenly have some keys from the keyboard from my gemibook 13 yesterday stopped to working. exactly are the Z,V,B, Space and the 4 arrows. the laptop is updated, i have testetd everything inclusive windows drivers and options. i have also open it, because i have read about battery problem, but it doesn’t shows, that the battery is swollen. have anyone an idea?

It is out of the warranty.