It's completely what? Are you implying that there is no such thing as having a 'bad' flash of a firmware? If you are, you're wrong, as it can and does happen at times, whether it be a DVD Burner, an MP3 Player, or any other electronic device that has firmware.
I don't actually think that a bad flash has anything to do with the issue here, as if the firmware was corrupt I doubt the drive would be functioning properly in any capacity. I only mention it as a rare possibility, even if extremely unlikely. When I suggested flashing the firmware to a newer version to someone else, I suggested it figuring there was very little chance it would be of benefit and even said so, but that it wouldn't hurt to try. And it worked, why I don't know but it did. I don't know what thread it was in, but the user responded that the discs that they were having trouble with could be read after the FW flash. What changed that allowed the discs to be read, I haven't a clue, but it solved their problem apparently.