Sincere thanks, I followed your instruction, and downloaded the Flash Utility for LiteOn drives, v2.2.4, and it ran smoothly, identifying my flash as EF 1400 OE, so it looks like you were correct in your assumption!
I then downloaded LtnRPC, and it instantly disabled my region coding, and just to make sure, I rechecked with DiscInfo again, and it now shows the following message:
Drive region status: No Lock Detected.
However, for some reason, upon checking with a dvd (We Were Soldiers) which has played through the drive without problems previously, and also via DVDfab been copied (for my own purposes only!) without problem, now it plays ok, but I have no sound! I will keep trying options to attempt to solve it though…
Almost solved, thanks to you! I will keep you posted…