I have had a replacement board fitted in my classroom. It has been running well for two weeks and then this week, it started turning itself off. This became more frequent and then the board showed no signal for the input from my destop computer. It also shows no signal for the input for Activ Connect so I can’t access this either. I have been able to get the board to connect to my laptop via HDMI cable but it still keeps switching off every few minutes and there is no signal on any other input. This is proving incredibly stressful.