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iMac Intel 27" EMC 2309 (Late 2009, Core 2 Duo 3.06 또는 3.33 GHz) ID iMac10,1, EMC 2374 (Late 2009, Core i5 2.66 GHz 또는 Core i7 2.8 GHz) ID iMac11,1

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iMac won't turn on

It does not work, when opening the iMac from the inside, I found that when I press the power button only the fans turn on and then turn off

Update (12/08/2019)

Only LED #1, what’s the problem now please

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https://i.ibb.co/hVsVfWw/BB1-FB818-5-B3-...

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Nintendo Switch Kits

A quick fix to get back in the game

Shop Switch Kits

Nintendo Switch Kits

A quick fix to get back in the game

Shop Switch Kits

답변 1개

가장 유용한 답변

In the bottom left corner of the logic board is a strip of tape covering over the onboard diagnostic LED’s. Carefully remove it so you can see them. Tell us what you see.

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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.

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