LG RZ - 42PX11 Problem

[alsy]

i.ve had my LG RZ - 42PX11 now for about 10 months, no problems to speak of, picture very good, apart from sometimes the background colours seem to pulsate ( mostly bright colours, Red, Blue Green etc ). Only just started to happen about a month ago. Does any one have any suggestions on the best settings to help get rid of this? Settings now are:
PSM user
XD on
CSM warm
Fleshtone 0
Contrast 49
Brightness 73
Colour 50
Sharpness 6

Thanks in anticipation

 

[nipbiplip]

Hmmmm.

Does this happen on all inputs or just component, by any chance?

 

[alsy]

Sorry about the delay in getting back, but it happens on all inputs