Hi guys over the last 3 days my sony bravia 55' tv has started doing random re-starts, i can be watching tv and all of a sudden black screen then Sony appears and then those daft twirling coloured symbals for Android then it turns on bck to normal. This can happen every 30mins or 60 mins or 90 mins. Being an electrician i have checked mains power and it perfect, but this is driving me crazy. Any assistance welcome. George.