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

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backlight problem ... inverter? panel? wire o logic board?

hello guys this is my first question here so be patient with me (and my bad english)

i have a backlight problem with an imac model no: A1224 and EMC: 2266,i have followed your guide to disassemle it and now i m confused on what is broken on my imac; those are the test that i have do:

- if i power on my imac and use a led torch to illuminate the display i can see everything and everything works great.

- if i disconnect the ccfl lamp cable from inverter to put 4 fully working ccfl (refurbished by a broken lcd monitor) and power on my imac the ccfl lamp dont power on

- if i measure with a multimeter on 4 pin connector on the inverter board i can see on the upper 2 pin 12v and nothing on the other 2 pins

- if i measure with a multimeter set in continuity mode the cable that connect: (first 2 pins) power supply to inverter board and (other 2 pins) logic board to inverter board everything "beeps" so the wire i suppose that is good.

my inverter board is a Apple part number 612-0051 someone can tell me what is the rigth pinout/voltage on this fully working board ??? i don't want to buy a new inverter if i'm not sure that it is the problem.

Any help, other test or suggestion are really appreciated regards

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1 Answer

Chosen Solution

Replace the inverter, if you can see the desktop, that's it and they are cheap.. Here's how: iMac Intel 20" EMC 2266 Inverter Replacement

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for sure is more cheaper than logic board... but i don't waste my money expecially couse i'm italian and i can't find easily this spare parts, so i have 2 questions:

- can u tell me the exactly voltage that i have to find in the 4 pins of a new inverter like mine ?

- is this one (that is in belgium) compatible with my imac ?

thank you


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Francesco will be eternally grateful.
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