2011 21.5“ iMac does not chime or boot but the fan spin, normal speed, for about 15 seconds then stop and after a few seconds start the cycle again.
Attempted all the resets but nothing worked; also there are no LED‘s lit up. It was functioning fine before a HDD to SSD swap - now the old HDD and SSD give the above result.
Changed the battery, same result.
Ist dies eine gute Frage?
Rep: 4,5 Tsd.
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It sounds like there could be an issue with the power supply if the LEDs are not lighting up. Make sure the power supply is connected properly. If it is and you're still not getting and LEDs, then you might need to replace the power supply. Good luck!
War diese Antwort hilfreich?
I am leaning towards the power supply, but what gets me is that the fans cycle on and at a 15 second time intervals. I thought it could be a stuck power button so I disconnected it, plugged it in and the fans started the spin up cycle again?!?!
What also gets me is that the power supply up and died during a HDD/SSD swap.
@kriswright I agree, that is strange! I'm still guessing that replacing the power supply will fix the issue, but it's hard to fully diagnose these systems without having replacement parts available for testing.
Well, I got the new to me power supply and installed it. Same as the original, as soon as the power button it pushed the fans cycle every few seconds, no chime and no LED's lit on the motherboard.
I am pulling my hair on this one. The HDD to SSD swap does not call for the removal of any components or wiring. Time to call on the community for any ideas.
Shoot! Sorry about that. I'm also at a loss now—seems like it could be a hardware issue with the logic board.
Well, seems that a update bricked my iMac. I got a good used motherboard and now it boots, to Linux Mint albeit only to a external monitor. I am getting three LED's but the fourth is off.
Time to make sure the data cable is seated, still have not found a good way to do that without it seeming loose. Besides that the GPU fan is in overdrive but that could be due to the LCD not being setup right - from what I understand, if there is a temperature sensor on a component and it is not working right the fan will go into overdrive.
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