Hi all, I working on MacBook Pro A2159 LB # 820-01598, it's just stuck on 5V. The two USB-C connectors on the side., when attached power adapter to one of them, comes up to 5.2V & nearly 0.32amp & then reset after about 15 sec. When attached the adapter jack to the second USB-C connector, it stays on 5.2V & NO amps taken. I took some measurements when the adapter jack was on the first USB-C connector. PPBUS_G3H 12.4V & it resets within 15 secs, & then it resets PP3V3_G3H_RTC: 3.29V, PP3V3_G3H: 3.21 & PP3V3_UPC_XB_LDO. I removed F7000 & check on Pin 1, PPBUS_G3H 12.4V is stable & no resets at all. The board is clean as ever, no shorts or liquid spill. Any tips will be greatly appreciated. Thanks
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Re: MacBook A2159 820-01598 Stuck on 5V
Thanks mon2, I will read all this tomorrow morning & inform you.Comment
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Re: MacBook A2159 820-01598 Stuck on 5V
Hi mon2, today I received the CD3217B12 chips (They say 100% ORIGINAL (:- ). Replaced both ICs & the Laptop is up & running. At first I did assume that one of these chips were defective as they 5V was resetting on one of the USB-C connectors & this is why I ordered 5 of them & the stencil too, if in case the chips were not defective, I could have re-balled them & use them again. Now I have to find which one of the CD's is defective. I will find out tomorrow by taking GRND to resistance test on both., & this link https://boards.rossmanngroup.com/thr...s-to-5v.62443/ does not make any sense as they assume the T2 chip is defective. Infact according to the the schematics, they talk about the DATA line which is the futher state of the laptop. In my case even when I reomved the fuse that you told me before, the board was having a 5 volt reset problem, this is why I came up to the conclusion that maybe the CDs might be defective. Now all is set & laptop is working fine. Thanks for the help.Comment
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