There are two ways that I'm aware of to perform a hard reset of the Q9h device.
1. From system tools, select Master Reset.
2. With the device powered off, press and hold the E and Z buttons and turn the device on.
By the way, I ran across a pretty good, if still somewhat sparse, site with information on how to hard reset devices called hardresetguide.com. There are only a few entries there so far, but it could turn into a very handy one-stop place to get info for hard resetting devices including the Q9h.