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stuck at 800mhz cpu freq

Hi, could use some help.

Got a late 2011 mbp 15'' (MacBookPro8,2) clocked to 800Mhz CPU frequency. It's started with dead battery.

I change battery, but it's still looks like not using speedstep.

OS reinstalled, tried ssd from another my mpb, tried battery from mbp 13'', changed fans. Ram checked and so on.

In linux i can force CPU to max frequency, but speedstep still dead.

And a really strange thing. Intel Power Gadget shows little short period of activity once mbp woke up, but immediately goes down to 800mhz.

Sure it's hardware issue, but have no idea what to do else.

Please help!

MacBook Pro (15-inch Late 2011), OS X Yosemite (10.10.3)

Posted on Apr 28, 2015 1:22 PM

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stuck at 800mhz cpu freq

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