Model A1224 / Mid 2007 and Early 2008 / 2, 2.4, or 2.66 GHz Core 2 Duo processor

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No picture, changed logic board

Hello I have this imac model (a1224) which has ati radeon 2600hd. I used to have no picture just power on (diagnostic leds only the first was ON). I changed the logic board now I have 3 out of 4 leds ON but no picture even on VGA out and also now I have the chime. I think that the problem might be from the VGA board. After changing the logic board is there any necessary adjustment that needs to be done or it will just work?


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Try reseting the PRAM. Start up holding down the P, R, Apple(command) & Option keys, wait till it tones three times then release and see if it starts up.

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Thanks for your reply. I did this heard for three times the chime but nothing changed. I think that the best solution (for now) is to send back the logic board (to the seller) for further check.


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