Hey, I've a broken A1224 (2007) iMac logic board. I think it's broken because of a bad PSU. I found a bad capacitor on it, it's absolutely burned, the C7431 one, above the IR panel. Now I removed, and would like to replace it, but dunno anything about it. Could somebody please help me? And is it connected to 4th pin of the IC, near of it? I just want to give it a try... why not! Now it doesn't do anything, when I try to power it on. No chime, no video, no fans. Thank you!