Computer shuts off after a few minutes of use

Question

iMac Intel 24インチ EMC 2267

モデル番号A1225 / Early 2009 / 2.66, 2.93もしくは3.06 GHz Core 2 Duoプロセッサ

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Jay Thomas @jaythomas77008

評価: 1

投稿日: 2014年8月11日

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Computer shuts off after a few minutes of use

Hi,

My iMac (early 2009, 24") started shutting down after a few minutes of use. It's not a clean shut down. It's an instant cut-off of power.

Using Hardware Monitor, everything looks normal except with the Northbridge...

- The voltage sensor always shows 0 volts.

- The current shows 0 as well.

I've tried resetting NVRAM and SMC, but that hasn't helped.

Does anybody have any advise before I replace the system board?

Thanks,

Jay

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Micheal @micheal55821 評価: 469 3 · Answer 1 · 2014-08-12T15:05:02-07:00

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Micheal @micheal55821

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投稿日: 2014年8月12日

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if you haven't already i would try cleaning the dust out, make sure the fan is still spinning, it sounds like a possible overheating issue

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Thanks Michael.

Overheating was the first thing I thought of. I tried all you suggested.

I also tried using smcFanControl to increase the fan speeds. I replaced the thermal compound on the Northbridge as it was running a little hot (about 75 degrees C at idle). It now runs about 5 - 10 degrees cooler. Everything else seems to be running cool.

So far, nothing has helped.

Jay Thomas さんによる2014年8月12日

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