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

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How do I fix black screen?

Here are the symptoms:

-When you press the power button, the screen flashes white twice, then stays black. Otherwise, everything else starts up normally with the chime and hard drive sounds, etc.

-Shining a flashlight to the screen shows it still works (just no backlight?)

-I've reset the PRAM, no go

-I've replaced the inverter board but that didn't work

-It does work with an external monitor attached

I am currently running an extended Apple hardware test to see if it brings up anything specific.

Could something on the logic board be bad?

Bad CCFLs?

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The hardware test did not find anything. Bummer.

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Soluzione Prescelta

It's the screen connection to the board, screen or video card

Here is the screen guide, take it apart and check the screen connector, if nothing, try a a screen

Installazione del pannello del display nell'iMac Intel EMC 2266 da 20"

If not, it's the video card or logicboard(I think this model has a MXM card)

I do not know much about the video card built onto the board or a seprate card, but I know this, if it's a ATI(AMD now) or NVIDIA, it's probably on a separate board, if it's intel, no, on the logicboard itself, you will need to take your iMac apart to know for sure about this

Here is the GPU swap guide

iMac Intel 20" EMC 2133 and 2210 Video Card Replacement

Immagine iMac Intel 20" EMC 2266

Guida

Installazione del pannello del display nell'iMac Intel EMC 2266 da 20"

Difficoltà:

Moderato

Immagine iMac Intel 20" EMC 2133 and 2210 Video Card

Guida

iMac Intel 20" EMC 2133 and 2210 Video Card Replacement

Difficoltà:

Moderato

1 - 2 hours

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Commenti:

thank you nick, i really appreciated you, its also solve my problem

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mike sarà eternamente grato.
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