Originally posted by dhc014
You need to use a patched 811S firmware since your drive is not a real LDW-811S.
You should NOT need 'patched' aka 'hacked' firmware for the newest Z-mod V4. You can load a regular firmware with LtnFW or FlashFix (see tools sticky).
You can find this in the instructions provided here (which is pretty much the readme from the mod).
Once finished, run LTNFlash and using the EEPROM tab, LOAD the newly modified EEPROM into LTNFlash then WRITE the new newly modified EEPROM onto your drive.
Download the latest firmware from LiteonIT's home page - at current time of writing, the newest official firmware is HS0P.exe available from the page.
Use the tool FLASHFIX to run on the firmware once downloaded. It is included in the package.
If you have problems understanding flashfix, read its readme file!
Once you have run flashFix on the new OFFICIAL firmware you downloaded from LiteonIT's website run the windows patcher (HS0P.exe for example) and accept the warnings. BE VERY CAREFUL TO FLASH THE RIGHT DRIVE!