My Surface Pro has been having issues when plugged in to power. Suddenly it shuts off and immediately turns on again regardless I am at home or at Uni and it is becoming more frequent to the point I just can't work safely on it when plugged in. Sometimes the screens flickers which is more noticeable on the lower part. Other times the screen starts to flicker completely ant then it turns off to start again. Could you please tell me your opinion on this? This is very strange as the Surface Pro runs perfectly on battery.