hi everyone, my imac 24 late 2009 won't boot. Here the situation: led 1 and 2 on, led 3 is on for a second when I press the power button, no chime, fans on, no boot. I tried all the combinations by keyboard, and resetted PRAM and all the things that Apple suggests. Any suggestions? Is it possible that the GPU is dead. My doubt is that there is no chime.
Thank you all in advance
[Re-Titled by Moderator]
iMac, OS X 10.11
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.
Does LED 4 light up?
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.
I'm afraid you're right!
Thank you, I know the leds function, the problem is that I don't hear the starting sound, as I wrote "ed 1 and 2 on, led 3 is on for a second when I press the power button, no chime, fans on, no boot." So I don't know if is a hardware or software problem.
Many thanks for the answers
I would say it's a Hardware problem.
Best of luck my friend.
Unable to boot iMac 24 late 2009
