A few days ago I would be sitting in front of the iMac and the brightness would fluctuate instantly 5 or 10 times in about 15 seconds from the 80% I have it set on to about half that and back and forth then stop. It would be fine for awhile then do it again. This happened pre mavericks. I have updates to mavericks, reset the PRAM-SMC etc. I have the autobrighness turned off.
Today it has not happened but after turning the computer on after about 15 mins the brightness instantly drops about 20% or so. I checked the brightness keys F1/F2 and nothing has changed.
The problem is that it is very intermittent and I doubt the Apple store will believe me. I tried recording it on my iPhone but every time I get to the cam app it stops. My wnty runs out late November.
Anyone exp this?
Today it has not happened but after turning the computer on after about 15 mins the brightness instantly drops about 20% or so. I checked the brightness keys F1/F2 and nothing has changed.
The problem is that it is very intermittent and I doubt the Apple store will believe me. I tried recording it on my iPhone but every time I get to the cam app it stops. My wnty runs out late November.
Anyone exp this?