A scart connector is not just a compact method of carrying A/V signals (it is definately not the best) it also provides comms for a whole host of domestic kit. The feature you cherished prior to cable change was due to pin 16 going hi, medium or low (voltage) Differing TV requires different levels of trigger. Now trigger is the keyword here for today. Your TV used to be told what to do by your VCR and SKY box when connected by scart. Now your TV has to look at the incoming video frames and decide how much is image and how much is black. This process works occasionally and better on some other sets. But the educated guess your TV makes may never be the right one. I have removed pin 16 from ALL my scarts to irradicate this most evil guessing game.