Model A1224 / Mid 2007 and Early 2008 / 2, 2.4, or 2.66 GHz Core 2 Duo processor

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My iMac is not working how can I find the reason

Hi,

my friend gave me a 2210 imac that has 20" , 2.4 ghz.

When i plug the power cord and hit to start button nothing happens.

I tried to find what was the problem. I removed the front bezel to see if imac has has a power supply; is it working ? I see a little green led on logic board, when i plug the power cord, that green light appears. I understood that the electric comes to logic board. Is the problem definitely from logic board , or must i test or reset something ?

Best regardsİ

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Use a multimeter and test the output of your power supply.

LED #1 Indicates that the trickle voltage from the PSU has been detected by the logic board. This LED will remain ON whenever the iMac is connected to working 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 source is disconnected or the PSU is faulty. LED #2 Indicates that the main logic board has detected proper power from the PSU when the computer is turned on. This LED will be ON when the computer is turned on and the PSU is working OK. LED #3 Indicates that the computer and the LCD are communicating. This LED will be ON when the computer is turned on and video signal is being generated. Front LED Indicates that the computer has power but no video signal (e.g., the computer is starting up or the display has entered Sleep mode, turning off the video signal). This LED will pulse when the entire system enters Energy Saver mode

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