Screen flickers after a full restore
I recently had my iMac 27" (mid 2011) into the Apple store for a display repair due to a faulty backlight panel.
The repair was carrier out and i got a new LCD display and backlight panel - job done. As part of the repair they reinstalled OSX 10.8.3 which significantly increased boot up time. Got the machine home, plugged in my time machine drive and did a successful full restore.
When i rebooted and logged in, the screen started flickering on a cycle of every 10.2 seconds. Its been very annoying as when the screen flickers, the active program becomes inactive, so for example, when im typing an email and the screen flickers, i will have to click back into the email to continue typing.
I set up a new user account for my wife on the same machine, and when i switch across to her account, the flickering stops. So its obviously a software related issue specific to my user account as hers is not affected.
Other than create a new account and migrate my stuff across, would anyone have any idea on how to isolate and fix the problem?
Thanks!
iMac, OS X Mountain Lion (10.8.3)