You seem to continually be fiddling with the drive without knowing what it is things do...No wonder the drive is not working. You do not need to upgrade the drive. You need to put the original firmware back on the drive, LEAVE THE EEPROM ALONE. And see if the drive will work. If it won't, and i have said this almost half a dozen times now, you NEED TO BUY A NEW DRIVE. From everything you have said, it would appear to me as though you have broken your drive.
Do some research before you try and crossflash the next drive you buy. You don't look as stupid asking questions as you do when you break your drive.
Edit: The media learn has nothing to do with your problems, that merely keeps track of write strategies that the drive learns as it burns discs. Clearing it will have no affect on your drives functionality, only the performance/quality of the burns.