Teclast f15 keyboard or motherboard problem purchased at banggood

This is the problem encountered, it appears that the "Q" key is pressed repeatedly and input operations cannot be performed correctly. Today it happened with the "Q" key, yesterday it gave the same problem with the "Home" key, it is not always the same key that seems to be pressed repeatedly. In these conditions it is not possible to turn off the notebook properly, it is not a software problem because the problem persists even from bios. It is probably a defect in the keyboard or motherboard