Hi all. I am working on MacBook Pro (Retina, Mid 2012) A1398 820-3332-A. There is no liquid spill & no physical damages on the logic board. The CPU/GPU heats sink heats up a lot & then turns off automatically. I did a re-solder job on the GPU VCORE chip U8900, but this did not help much & also updated the BIOS. Added brand new coolant compound but still the same, after about 1/2 hr, it heats up & then turns off automatically. Just asking anyone will the CPU & GPU BGA balls reflow will be suitable to rectify this problem. Any tips or help will be greatly appreciated. Thanks in advance
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Hallo everyone, my A1398 do not charging the battery and the battery also do not bin recognized. I did all the reset work, SMC reset and all the other reset options but nothing helped. on the SMC at pin 2 (DCIN) there are 20,4V coming in. at pin 16 (BGATE) which goes to the Q7155 Gate there are only 11,43V. at the pin 1,2 and 3 on the Q7155 (Source) there are 12,23V. Cap C7126 is not shorted. As I understand, the gate voltege have to by higher then the source voltege for the gate to clous so the battery can be charging, am I right? can someone help me with this? I guess that manny models are working... -
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