Okay, in your first post, when you say hard reset, are you meaning that you are holding the power button down until the phone restarts or are you factory resetting the phone via the recovery menu?
If you haven't attempted a factory reset yet, we can do that, but I'm assuming you already did
THIS?
If this is not an option, there may still be hope. It's possible that we might be able to find an RUU (Rom Update Utility) to return your phone to a factory state.
To see if we can find the proper RUU, can you tell me the information on your bootloader screen? (The screen you see after holding volume down + power).
Also, I don't know if you have any experience using fastboot, but some helpful information would also come from running the
fastboot getvar all command.
You would need to have the proper tools to do this (our forums
Mini SDK would be enough) but let's see if we can get by without that first.