certain keys on keyboard (dock) not working all of a sudden

[wfz]

q, w, r, y, u, o, return keys are not working all of a sudden. Is it a hardware problem, or if there is something that accidentally turned on to disable the keys? I connected a USB keyboard and it works fine. I'm concerned that it's a hardware failure but I noticed there is a pattern in the non-functioning keys so hopefully it's just something I turned off.

Also if dock is connected, how can I force the online keyboard to show up and type? If the keys are not working, I still would like to connect the dock so I can have more battery to use.

Thanks,