I have installed the latest drivers because I downloaded them all and installed them for the mainboard instead of the ones on CD. The BIOS version was up2date too. I could try to check cables but since my computer is a bit stored, I cant do it right now. mmhm :z But as I remember the SATA cables were like they "click" when they are well in the slot, so they are always well plugged and not lose.
Edit: Ah, you meant firmware update for the DVD Rom. Well, I do not know which version I have installed. However, when I visit the LG website and click on the firmware download of my device model, then the it doesn't start a download and instead just opens an empty tab. Like a broken link.