HOW TO REPAIR :-
Steps to follow:
1. Download the zip OMAP Flash tuna.
2. Extract zip to whatever location you're comfortable with (I used Android directory)
3. Open up Device Manager.
4. Go to actions menu, select Add Legacy Hardware
5. Choose install manually, then have disk. Browse to where you extracted the zip, select the 'inf' file in usb_drv_windows.
6. Choose OMAP4460, you'll get a popup if on Win 7, continue anyway (driver not signed).
7. Once completed with driver, pull battery out of phone, then plug it into USB
8. Double click omap4460_tuna_hs_pro.bat to start the process.
If you see "waiting for device" - disconnect and conect the phone again.
Once you see "Press any key to continue..." close the CMD window.
9. Unplug from USB, put battery back in, and power-up!10.
Extra step - depending on what's been done, it may 'brick' again -
suggest to do a restore or a wipe reinstall afterwards to be certain.