ytesfay80
Member
This board was liquid damaged. I replaced some components around the lp8550 and thunderbolt area and ultrasonic'd it and now it turns on and everything. The only problem is that the battery is not charging.
The initial customers battery said it wasn't charging and "replace now" so I thought the battery was the issue. I ordered a battery and plugged it in and that one still says battery not charging. The battery is recognized, condition is normal and has only 87 cycles.
I replaced the ISL6259 and all current sense resistors/caps(even though they measured good) but that still didn't solve the issue. C7035/36 & c6960 looked bad so I replaced them as well.
I flipped the board over and noticed the probe points next to R7050 were burned away(Probe 1271/72). I replaced R7050, Q7055, and D6950 but that still didn't solve the issue.
There was liquid damage near the smc initially so that may be an issue
In diode mode Pin 1 of R5280/81 is 0.34v and Pin 2 is 0.486v.
Update: The BIL connector looks fine and there was continuity to the R5280/81. C6952/3 on the other side of the BIL didn't look great so I replaced those as well but still no change. I replaced C4920 & C5020 since they didn't look well either.
The initial customers battery said it wasn't charging and "replace now" so I thought the battery was the issue. I ordered a battery and plugged it in and that one still says battery not charging. The battery is recognized, condition is normal and has only 87 cycles.
I replaced the ISL6259 and all current sense resistors/caps(even though they measured good) but that still didn't solve the issue. C7035/36 & c6960 looked bad so I replaced them as well.
I flipped the board over and noticed the probe points next to R7050 were burned away(Probe 1271/72). I replaced R7050, Q7055, and D6950 but that still didn't solve the issue.
There was liquid damage near the smc initially so that may be an issue
In diode mode Pin 1 of R5280/81 is 0.34v and Pin 2 is 0.486v.
Update: The BIL connector looks fine and there was continuity to the R5280/81. C6952/3 on the other side of the BIL didn't look great so I replaced those as well but still no change. I replaced C4920 & C5020 since they didn't look well either.
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