Origineel bericht door: Gareth ,
Just acquired an 20" iMac EMC 2118 which was completely dead, absolutely nothing on power up. Dismantled and cleaned it then assembled the parts on the bench. Power supply was clicking and when checked it with a meter it put out zero volts. Swapped this for a PSU from a 17" A1144 (which I happen to have). The 20" now works fine. The 2 PSU's have totally different part numbers (both Apple and Celetronix) but they are identical. I took an age to check the components with a magnifier to make sure. Now all I need to do is to figure what is the problem with the original PSU and what is causing the clicking. The capacitors look fine but I think I will change them anyway. Watch this space!