Hi, this problem is not specific to OpenLP but arose when using it and I am hoping someone on here will know the answer. I was happily projecting OpenLP on my usual Windows laptop when i had to disconnect it to allow a guest speaker to present using a Mac. When I reconnected the Windows laptop, it would not detect the projector. Restarting the laptop didn't help and I eventually dioscovered I had to restart the projector which of course takes time as it has to cool before you can turn it back on. Any ideas how to overcome this ? It seems that once the projector has been connected to a Mac it won't recognise anything else.