screen went dim
I never had this problem before. I bought a used 27" iMac to replace an older model. Everything was good for a week or two, then one morning when I turned on the computer from sleep mode, the screen was noticeably dimmer than it was before. I did not do anything that I know to have caused that.
I cannot access Apple help, as they are closed for maintenance, or something, so would appreciate help here.
I'm sure it's a simple fix, but having fiddled, I have not been able to figure it out.
I'm on Mountain Lion.
This post was edited by naturelle on Mon, Aug 26, 13 at 8:34