Sorry EG, I don't think I can offer much advice at all to that already said... I had hoped that unticking that box, might help in some way, but obviously not... One thing I did read a while ago, is that there may well be problems, if you use a HDMI to VGA conversion connecting cable... Don't know why, just read somewhere that such causes problems... Try Googling the question...
But having other problems when connecting the power lead, is quite beyond me other than to say, can you try another power adapter, to make sure yours is not faulty in any way... If you'd not already tried that, such is the route I'd go down for a start...
Sorry I can't be more helpful than that...
Robbie....