Model A1224 / Early 2009 / 2.66 GHz Core 2 Duo processor

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Why does my screen flash on and then go dim?

Hi i have been having a issue with my i mac for a while now, basically one day i switched it on and the screen would light up for a few seconds and then go dim ( and leave a faint image in the background if i use a torch ) so i came straight onto Google and researched it. Many people said do the 2 resets--> apple button alt, p, r, so i tried them no luck so looked into it more and seen was likely the inverter so ordered correct replacement followed the instructions to replace it and it does the same thing....

I will add a you tube link to the a video i made of it just to clarify i am attempting the correct fix to the issue

http://www.youtube.com/watch?v=NVgVaNkh7...

If any help is available please feel free to comment

( I have checked the 4 green lights and they r fine )

( I have been using the computer on a external monitor and it still works fine )

( yes the brightness is all the way up )

I purchased this as replacement

Thanks again

Answered! View the answer I have this problem too

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This really sounds like the inverter to me too. Just to eliminate any software issues, boot up from your system installation DVD and see if the same thing happens.

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yeah I really don't know where I am going wrong! I have re installed apple multiple times and still up against a brick wall.

Im sure I didn't but to say I connected the 4 inverter cables into the wrong slots would that cause it ?

I tried changing the wires around and the screen seems to stay on for longer in diff orders and if all four are connected it only stays on for say 1 second where as if only 2-3 are connected it stays on for 2 and a half seconds no wires seem damage or broken in anyway and I am typing to u off the machine but just using a external screen. just really starting to bug me now. Thanks for ur reply and help

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daniel will be eternally grateful.
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