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Macbook Pro A1706 battery charging issue.

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Praveen Sahwal

Member
Hi

Got a dead Macbook Pro 820-00923-A. Q7040 was faulty-short circuit. After replacement machine started working but had issue switching power from adaptor to battery when plug out the adaptor. i kept it pluged in for few hours to charged the battery and it did charge but same transistor failed again Q7040 short circuit. replaced it again and device works fine with battery or adaptor but fails to switch power from adaptor to battery.

what can be the reason?
 
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Praveen Sahwal

Member
checked all d R/C7030/40. all looks ok. also replaced Q7065, C7051/50/7055. didn't make any difference.

it takes normal current when start up and stays arount 200mAmp after boot without battery but suddenly starts fluctuating with random values 500-900mAmp for few sencods and come back to normal value 200mAmp. Q7040 is only which gets hot around pin 1,2,3,13.
 
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