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I have an update for this board, I decided to last-ditch effort toss the board into a reflow oven to see if maybe there was a poor solder connection somewhere that was causing the issue, when I pulled it out it was taking 20.3v 0.18-0.20amp. The device does cause fan spin for about 5-6 seconds...
I swapped BIOS chips between my working (without USB devices) MacBook and my non-working MacBook, looks like the BIOS chips are fine, the non-working machine is still remaining to have pulsing amperage between 0.02-0.09 amps at the ammeter,
looks like it might be water...
So I tested using USB 2.0 and 3.0 using both a mouse and a flash drive and it seems like initially they are fully powered for 0.1 second (lights are at full brightness for both the mouse and the flash drive) but then nearly immediately dim (the flash drive) or the light goes out completely and...
I only have access to the one USB-C Hub, but it works on my primary macbook.
When working on my primary MacBook, the Flash drive pulls 5.04v, 0.09a
When plugged into the non-working USB MacBook the drive pulls, 5.08v, 0.0007a or 0.7ma
Ah my apologies 2informaticos,
I misunderstood, R7101 is 10.9ohm measured, I measured it to ground the first time.
Also after connecting the two pads for SW9988 and plugging in the charger, device pulls 20v and pulsing 0.02-0.09 amps.
I have another macbook that had liquid damage that I repaired, it had a short to ground under U2800, as well as a damaged J3300 which I replaced both of making it boot and operate as normal.
The only item that does not work properly is that the device will not recognize or show a USB...
That's quite unfortunate,
My J4810 connector hinge broke so am currently waiting on a replacement to arrive soon before I can test SMC Bypass,
R7101 is at 53k ohm
I'll keep looking for another corroded component/trace, but as of now looks pretty bleak.
when board is tested alone, nothing...
Thank you! After being a long-time lurker I'm excited to join the club!
Areas affected by the spill were USBC area from C6405 down to U8400, no liquid damage was actually on J3300 or U2800 , just around the rough area of that side of the board
Ohm to ground:
Hello, I have a board that had previous water damage that is pulsing PP5v_s4.
I can eliminate the pulsing of PP5v_s4 when I remove R7192, when this resistor is removed I get:
It seems when this resistor is put back into place PP5v_s4 begins pulsing again.