I tried to update the firmware of my SONY DVD RW DW-U18A drive, which had a UYS1 firmware. Unfortunately, I made a mistake, and had to use mtkflash utility. I tried putting it back to UYS1 firmware, and it seemed to work, but my drive wasn't recognisable. I have since then tried using mtkflash to update it to UYS4 LiteOn SOHW-812S, all of which gives me the same results (it says it works on DOS, but when I reboot, I can't see my drive anymore).
Can someone please help me?