Liteon Ltd-166S

Unfortunately I destroyed the Firmware of my Drive!
Now, if conected as Slave to IDE 1, the Bios dont recognise my bootdrive anymore! So windows is only possible without connected DVD-drive! Can anybody tell me how to fix the firmware from DOS-level? Mtkflash and binary firmware didnt work! The drive is dead!
I think, the bootsector or the indentification of the drive is destroyed!!

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