Sony dru-710 dead afterflash help



I hav problem with sony, yesterday I Change frimware to yJ02 and after restart the drive is not detected in windows (in bios yes) and the green lamp is blink.
I try to reload orginal frimware using mtkflash (dos) and:
I create a boot disk a:
my dvd+r is on second master so I type: mtkflash 3 w /b BYS3.bin
ind it write: port 170, master/slave a0 and nothing… when I give Esc its write: err something with 51 should be 71

Then i try MtkWinFlash and when i Flashing the program give me this:

Press Browse Load Bin/Hex & Flash
ERR: fail to identify the flash type!

I try todisconet Idm in bios nothing change, in nero info tool thehe is no this drive PLEAS HELP I have only this dvd 1 month