Iâ€™ve got a BENQ CD+RW drive that Iâ€™ve had for a couple of years now. When I first used InfoTool on it, it showed the information as expected, but at some point (I donâ€™t know exactly when, but Iâ€™m fairly certain it was after upgrading some different firmware versions a few times) it shows everything as expected except for the serial number. I am 99.99% sure that it used to show a proper serial number, but now it shows Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿Ã¿.
Notice that those are 30 0xFF characters (aka binary â€œblanksâ€, like NULLs). I canâ€™t find a raw copy of the firmware to check, but either it contains this sequence of characters somewhere, possibly as padding, or else (and this is more likely), the upgrade app did not stop writing the firmware when it should have and wrote FFs/-1s when it ran out of actual data. Either way, part of the driveâ€™s firmware seems to have gotten overwritten that should not have.
I have tried burning different firmware versions, including older ones, but they donâ€™t fix it (probably because they donâ€™t include the serial number and are not meant to write that part.)
I should point out that this is the only abnormality and that it seems to work fine otherwise.
Does anyone have any ideas on what may have happened and hopefully how to fix it?