- Joined
- Sep 7, 2011
- Messages
- 8
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- Location
- Maryland, USA
- Your Mac's Specs
- Late 2006 2.16 GHz Core 2 Duo 15"
My friend has an early 2006 15" Core Duo 1.83 with a serious SMC problem. After cruising the forums, I've gathered that this model is notorious for overheating. So here's how I've reached my diagnosis:
--She complains that computer gets hot and shuts down unexpectedly with moderate use of CPU
--battery cycles are dead due to unnecessary power usage
--After running CPU stress test and monitoring temperature, it read that her core was tripping shutdowns at 255 degrees F (123C!!), with no fan response
--Downloaded SMCfancontrol and tested fans, manually setting on 5,000rpms- system hovers around 215F (100C) on load, which is still not good
--reset SMC and PMU
--physically inspected fans for blockage or mechanical failure
--when manually setting fans at higher minimum rpm, fan speeds DO increase, but at a very slow rate and only tops out at 3,500 rpm at the core's hottest temp.
SMC IS communicating with the fans, but very poorly, and it would be a serious inefficiency to run the fans high all of the time. Any thoughts? Thanks
-mJ
--She complains that computer gets hot and shuts down unexpectedly with moderate use of CPU
--battery cycles are dead due to unnecessary power usage
--After running CPU stress test and monitoring temperature, it read that her core was tripping shutdowns at 255 degrees F (123C!!), with no fan response
--Downloaded SMCfancontrol and tested fans, manually setting on 5,000rpms- system hovers around 215F (100C) on load, which is still not good
--reset SMC and PMU
--physically inspected fans for blockage or mechanical failure
--when manually setting fans at higher minimum rpm, fan speeds DO increase, but at a very slow rate and only tops out at 3,500 rpm at the core's hottest temp.
SMC IS communicating with the fans, but very poorly, and it would be a serious inefficiency to run the fans high all of the time. Any thoughts? Thanks
-mJ