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Model A1419 / Ende 2012 / 2,9 und 3,2 GHz Core i5 oder 3,4 GHz Core i7 Processor, ID iMac13,2

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Replaced Power Supply and Fan spins at full speed, iMac does not boot.

I suspect that the SSD temp sensor is bad. I installed this sensor years ago when I replaced the HDD, then later upgraded the HDD to SSD… so maybe the sensor is bad… I’m not sure.

I did order a new sensor:

OWC In-line Digital Thermal Sensor for 27-inch iMacs (macsales.com)

https://eshop.macsales.com/item/OWC/DIDI...

I’m hoping it will fix the issue with the fan running at full speed when I power on the iMac.

If that does not fix it… I might have to replace the logic board. Not sure what the issue could be.

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You may be able to put iStat on there and figure out which sensor is acting up. From there you can formulate a plan to fix.

https://bjango.com/mac/istatmenus/

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Yeah but iMac won’t even boot up, plus I need to reinstall MacOS on the new SSD

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sorry, I missed that. Are you seeing anything on screen when it tries to boot?

von

@memphismac No, not seeing anything... I'm pretty sure it's the logic board... because I connected the original HDD and still nothing.

von

Just to be clear the iMac is not getting any power or anything right?

I guess next step would be to open it up, plug it into power and look at the diagnostic LEDs and see what they are showing. LED 1 means it's getting trickle voltage to the logic board. If LED 1 doesn't light up then it's most likely the Power Supply. LED 2 will turn on when you push the power button and the computer begins to startup.

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kamilgoslawski wird auf ewig dankbar sein.
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