Hi. Dear friend, i have an Acer Apire 5535, and until now there are no firmware updates for the drive Liteon DS-8A2S, which is the same as yours.
However, i had recent problems with my drive “accidental firmware update” that currupted my EEprom.
Can you make&send me a backup of your dive EEprom so i can try to fix mine ?
To backup your drive EEprom you can use this software: