With about 10 minute intervals I keep getting a popup-message saying "Are you sure you want to shut down?" With options; sleep, shutdown, cancel etc.
Usually I hit Cancel to remove the dialoge box, but if I leave it open the computer eventually short circuit and dies.
I've searched around for possible solutions, but all I can find is some problem with the 30" Cinema Display - which I do not have, or use.
Does anyone have any ideas?
Update: The computer also has trouble booting - only way I can get it started is to boot while holding F1. If I do nothing but hit the power button the computer short circut right after the startup sound and Apple logo appears.
Update 2: It seems the popup only appears if the computer is idle. If I keep using the keyboard or trackpad nothing happens.