I had the exact problem as described in the article. Bought a graphics board online. I could not locate any new ones, however, for a mid 2008 iMac. Followed this procedure and the referenced one for opening the iMac. Both very excellent guides. Thank you so much for posting them. I would only reiterate the part about being very careful when pulling up the outer glass. The alignment pins break off very easily. I broke 2 or 3. The good thing is that they don't seem to be essential to the screen as it is held in place very well with the magnets. Thanks again for the excellent guides!
Lorsqu'il en aura reçu, il pourra afficher un graphique de sa réputation au fil du temps.
Voici un aperçu de ce à quoi ressemble ce graphique :
Aucun point de réputation obtenu pour l'instant.