iMac 27' 2009, shime + white screen. Looking for some tips.

[dukefawks]

My guess is a bad HDD. It will hang on the grey screen trying to detect it. Unplug HDD and see if you get the blinking ? after 30 seconds.

 

[CreeAll]

Okay, this is embarrassing.
Spot on Dukefawks. Switched HDD and we got a full boot.
I was pretty confident thinking the apple logo / question logo / folder logo / ... was a prerequisite to any other kind of peripheral issues (as in anything that's not a board/cheap).
But I was wrong. I'll need to find a resource on the apple boot steps and their true meaning now.

Case closed. Thank you !

 

[CreeAll]

No Title

Here comes the photos.
I wonder if I should be worried about the state of this "unknown" board ?
Top left (second to left actually) when you look straight after opening the thing.

 

[dukefawks]

I see nothing wrong, that is how these PCBs look. Put HDD in there and be done with it.