First open Firmware Toolbox V4.5
Load your firmware into Toolbox v4.5
It will load the firmware.The top line shows the path to the firmware.It will show you the kind of firmware it is.Sam,Hit or benq.
It will put your key in the window beside "KEY"
As long as it is a lot of different letters and numbers it should be good.
A bad key will be a lot of the same letter or number.
