Right so it just seems to be DVD recorder settings that are causing the problem. I have tried to find a copy of your manual but have had no success and reading up on your Recorder model on the net shows that although everyone sings the praises for the recorder itself, the manual is given the thumbs down and the kindest comment says that it is Gibberish
So ... it will be trial and error unless you feel up to braving LG Support. Here's the link where you can even get live support on line, or by phone.
http://www.lg.com/uk/support/product...roduct-profile
Do you have more than one scart "input" socket on the recorder if so is there a number on them ie av1 av2 etc?