answer:Well given the symptoms, my best guess is that the touchpad hardware is somehow being affected by some kind of power glitch. Did this happen before the formatting? If not, I wonder what changed between its last working configuration and the new formatted state. From what I’ve seen about this online, it could be electrical issues at the power source (your plug or power strip, etc). But if that hasn’t changed from before to now, I am not quite sure without more knowledge of the variables