Lite-ON DS-8A2S

Hello, my laptop recorder is identified as a DS-8A2S.

Apparently this model doesn’t exist on the official web site.
I can only find the models DS-8A2L and DU-8A2S.

I opened the notebook and found DS-8A2L writed down the driver, but still being identified as DS-8A2S.
I already tried upgrading to a real DS-8A2L but so the led keeps blinking.

So I upgraded back to the original firmware that I made a backup.

Any idea of which firmware I could use to upgrade this?