Chosen Solution
I have a Mid 2007 (A1224 EMC 2133). I’ve had it for about 10 years. It died suddenly about a month ago. No dramatic end, no smoke, no flames. I did some research and figured that it might be the power supply. I purchased the appropriate one from Ifixit and installed it. This didn’t work, the computer is lifeless. Is this a loss cause? Update (10/28/2018) Is this helpful or am I gonna have to take this computer apart? @oldturkey03
What does the onboard diagnostic LED’s telling you?
Here’s a breakdown of the onboard diagnostic LED’s: LED 1 - Indicates that the trickle voltage from the power supply is detected by the main logic board. This LED will remain ON while the iMac is connected to the AC power. The LED will remain on even when the computer has been shut down or put to sleep. The LED will turn off only if the AC power is disconnected or the power supply is faulty. LED 2 - Indicates that the main logic board has detected proper power from the power supply when the computer is turned on. This LED will be ON when the computer is turned on and the power supply is working correctly. LED 3 - Indicates that the computer and the video card are communicating. This LED will be ON when the computer is communicating properly with the video card. If LEDs 1 and 2 are ON and you heard the startup sound, but LED 3 is OFF, then the video card might be installed incorrectly or need replacement. LED 4 - Indicates that the computer and the LCD display panel are communicating. This LED will be ON when the computer is turned on and video signal is being generated. If the LED is ON and there is no image on the LCD display panel, the LCD display panel or inverter might be installed incorrectly or need replacement. Update (10/28/2018) Sounds like you need a new logic board iMac Intel 20" EMC 2133 Logic Board here’s the IFIXIT guide you’ll need to follow: iMac Intel 20" EMC 2133 and 2210 Logic Board Replacement
