Screen won't turn on after cpu upgrade

Question

iMac Intel 27" Retina 5K Display (Late 2014 & 2015)

Model A1419 / EMC 2806 / Late 2014 or Mid 2015. 3.3 or 3.5 GHz Core i5 or 4.0 GHz Core i7 (ID iMac15,1); EMC 2834 late 2015 / 3.3 or 3.5 GHz Core i5 or 4.0 GHz Core i7 (iMac17,1) All with Retina 5K displays

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Sean H @hoganseand

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Postado: 27 de nov de 2016

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Screen won't turn on after cpu upgrade

I just upgraded my late 2015 imac's cpu to an intel core i7 6700k skylake unlocked 4.0Ghz processor and when i tried to turn it on after, i got the chime that it turned on, but the screen will not turn on . I checked the connections and they're all good, so i have no idea what it could be . Anyone have an idea? Thanks

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I followed ifixits procedure step by step. And the fan works as well as key noises but the screen wont turn on...

27 de nov de 2016 por Sean H

Also tried resetting pram and smc..no luck

27 de nov de 2016 por Sean H

Switched back to my old cpu....no luck wtf

27 de nov de 2016 por Sean H

Sooo i just found out that its all working good...except the screens light is dead. If i shine a flashlight on it i can see everything...wtf how can i fix that? Replacing a 5k screen is probably $$$$$

27 de nov de 2016 por Sean H

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I followed ifixits procedure step by step. And the fan works as well as key noises but the screen wont turn on... — Sean H
Sooo i just found out that its all working good...except the screens light is dead. If i shine a flashlight on it i can see everything...wtf how can i fix that? Replacing a 5k screen is probably $$$$$ — Sean H