[SOLVED]MacBook Pro "Core i7" 2.4 17" Late 2011 lagging

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i have a MacBook Pro "Core i7" 2.4 17" Late 2011. the mac lags everywhere, in apple diagnostic, recovery, new drive, new drive plugged in via usb. nothing seams to stop the lag. i remember when i was training with louis he mentioned this issue could be caused by the board but i do not remember what he said it was caused by.
 
i ran the apple diag by holding down d and option, the only error that comes up is battery, wich we know wont charge and needs replaced
 

SMMRepair

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Some will, some wont. I've had some 2011/2012 15" models that DID experience slow-down/throttled issues without a battery installed, while some others didn't. I would test with a known-good (original Apple) battery, known-good (original Apple) 85W charger, and a known-good trackpad/cable.
 
sweet the battery was the problem, thanks for the heads up, i thought if i unplugged the battery it would rule out the battery as the problem.
 
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