My iMac Screen occasionally flickers and dims

Joined
Oct 10, 2010
Messages
28
Reaction score
1
Points
3
Location
Suffolk, England
Your Mac's Specs
27" iMac i7
For the last month my iMac has begun to occasionally flicker for about 1 second and then dim slightly. After about 5 minutes it has returned to its normal brightness.
Its not causing too much of a problem, but its obviously not right.
I wonder if its on its way to the knackers yard or wether its a victim of my upgrade to Yosemite.
Has anyone a similar problem, or ideas?
 
Joined
Oct 16, 2010
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Location
Brentwood Bay, BC, Canada
OP
A
Joined
Oct 10, 2010
Messages
28
Reaction score
1
Points
3
Location
Suffolk, England
Your Mac's Specs
27" iMac i7
To be honest the google sites don't help as I don't have a problem as they describe. My screen just flickers and dims once every half hour or so. Not on one side as the googlers describe. I also tried switching off and restarting (SMC) but nothing changed.
So
I wiped it all and reloaded Yosemite - Still no change
I wiped it again and installed Mountain Lion and "Yey" my problem as gone, well at least for now it seems. Now all I have to work out is how to retrieve my Yosemited files off my Time Machine!; But at least I know I don't have to bin my Mac.
 

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