kernel_task at 240, fan spins normally
Hi all. So I got this iMac 27” Late 2015 with a mechanical HD. It was behaving normally. I left it there sitting for a couple of months. Lately I replaced the HD with an SSD. I noticed it was very slow. Installing Monterey took forever. Monitor activity shows kernel_task at 240/250, but fan spins normally. What I did so far:
- Cleaned all the dust inside of the fan. There wasn’t much anyway
- Replaced the memories with timetec ones as they’re certified
- Replaced the ssd with a brand new samsung one
- Removed the logic board and got rid of the 32 GB blade ssd
- Replaced the PSU board with a known good one as I’ve read it carries thermal sensors which could cause the problem
- Replaced the fan with a known good one
- Diagnostic (cmd-d on startup) shows nothing
- Safe-mode doesn’t change things
There are no apps running, no third party software. Monterey is clean install, including latest update (which also took forever).
Apart from speakers, I can only try to replace the sata cable, the pram battery and the wifi card. If that makes any sense.
Any suggestion would be appreciated.
Thanks everyone.
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