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Hi there, I was wondering if you guys could help me out. I upgraded my i3 to an i7 870. Since then after the first sleep after reboot the temp sensors are not available causing the iMac to sleep every 5 seconds after that. Any ideas?
Well… You used the correct chip so thats not it. At this point I suspect you either failed to connect the sensor cables back in correctly or you damaged something on the logic board in the process. Did you follow this Member-Contributed Guide? Upgrade iMac Intel Core i3 CPU to Core i7 Update (09/08/2016) Have you reset the systems NVRAM & SMC? I would start there. How to Reset NVRAM on your MacReset the System Management Controller (SMC) on your Mac I would also check my systems firmware level: About EFI and SMC firmware updates for Intel-based Mac computers making sure it was at the listed levels or newer.
