Pink and Green colours on screen

Hi,  I am sure this topic would probably have been raised before.

I have connected my WD TV Live Media Player to the TV via the YPBPR connection and am having a problem with the colours on screen. The dominant shading is Green and Pink and I cannot seem to change it through settings.

I have a limited number of HDMI ports on the TV and already have 2 boxes connected but might try that (should have done so before I put this message up I suppose!) connection to see if it resolves the issue.

Has anyone else had these issues and resolved it via other means?

I have recently upgraded the firmware and this made no difference

May be a dumb question, but are you sure your component cables are correctly lined up?