Guys, I have an iMac 21.5" and when I start it up the picture is clear, crisp and bright for about 2 seconds before it dims. I've searched and cannot find an auto dimming setting, neither can I see why the colours would look duller than when it's first booting up.
Does anyone know why it does this, and how I can keep the original brightness from when it first starts?
Thanks.
Does anyone know why it does this, and how I can keep the original brightness from when it first starts?
Thanks.