TS3824: iMac (Mid 2011): Unresponsive white screen on startup or vertical lines on screen
Learn about iMac (Mid 2011): Unresponsive white screen on startup or vertical lines on screen
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Helpful answers
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Dec 9, 2012 3:13 AM in response to Leon Ellenportby Radiation Mac,What exactly do you mean by your "Mac is unresponsive"? Do you mean it won't power On at all? Or it powers on but you get a distorted screen image? Or?
Hope this helps
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Dec 9, 2012 4:04 AM in response to Radiation Macby Leon Ellenport,The following happens when I turn on my iMac
Five thick vertical lines appear.
Behind these lines is the Grey Apple Logo
The cog wheel appears
After a minute or so the display goes white
It is thus unresponsive
Each time I power up the iMac the vertical lines change colour.
Apple support pages advise to upgrade graphics card to Firmware 2
Hence my question
I hope this answer gives a clearer explanation
Thanks for your interest
Leon
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Dec 9, 2012 4:06 AM in response to Leon Ellenportby Shootist007,★HelpfulYou have a bad hardware problem and No update will fix it. Take it to an Apple Genius Bar and have it fixed.