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<blockquote data-quote="mystadobalina" data-source="post: 1325809" data-attributes="member: 214416">My friend has an early 2006 15&quot; 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&nbsp; &nbsp; &nbsp; 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</blockquote>

[QUOTE="mystadobalina, post: 1325809, member: 214416"] 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 [/QUOTE]

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