Recent content by shassh

See attachment. It's the pin (red) which had short to ground (green). But it seems to be only that pin, not the same in the other side. It's either the CC1/2 or SBU1/2 pin. why only one is shorted I don't know . But could explain why the cable only works one way with 14.5v. I have a suspicion...

Even weirder, I thought just in case there are bad solders I will reflow u4700, put everything back together. Same issue with the cable giving 14.5v one way, but it's the OTHER way around (I initially marked it so I knew). What the hell is going on...

Just had a look, no short on either capacitor. Maybe it's the SBU1/2 pins on the port. I'm not sure. But I disconnected the port fully and tested the pin CC1/2 or SBU1/2 (I can't tell which it is) .One of these is short to ground without anything connected to the port . I checked voltages on...

Just another update, So changing the U4700 IC did fix the issue, for a little while then it died again. Changed for the second time and it's still going however usb storage devices are not recognised. The original usbc charge/data cable seems bad to me, when I connect my mobile phone the...

I've gone ahead with B, just incase. Will update when I receive them. Thanks for you help .

I'd like to ask, looking at the schematic suggests SLG4AP645AV chip, however on the chip on the board it has 645BV D5002 URD stamped on it. Will a SLG4AP645AV work on it or will I need specifically SLG4AP645BV, B being a lot harder to source. Cheers

Thank you for your help. Will try that and let you know how it goes .

I was just a bit confused why the top of Q4750 was conductive to those lines - still learning. Follow lines tested with diode mode to ground: PPDCIN_G3H = 504 PPDCIN_E85_SS = 504 PPDCIN_E85_SS_DIV = No reading. Q4750 pin 1 and pin 4 = 683 Q4750 pin 1 and pin 2 (and pin 3) = 723 Q4750 pin 4 and...

All checks were done with charger and battery disconnected. Following readings in diode mode. D4750 = 682, with no connectivity with probes the opposite way around. So assume diode is good. PPDCIN_G3H rail = 0, full connectivity with the top on Q4750 - I'm not sure if that's normal or not...

Ive done a few tests, apologies for being a noob. F4700, C4750, C4755, R47551, R47561 = all seem fine, though 0v D4750 = fine, though I havent removed it - it looks fine - 0v Q4750 = looks okay, but is the top of it (the shiny layer - I was curious) supposed to be on PPDCIN_G3H? I checked the...

Hi thanks for your response. I have tested the board with charger only, 2 different chargers (one new), and 2 different USB-C ports (one new). Still no power. F4700 checked and is fine, no short to ground either Its almost as if the motherboard/charger are not detecting each other. Anything...

High fan is caused by temperature sensor issue, from my experience. If U5410 is for sensor it could be.

Just to add, I have tried another USBc port, which gave the same results. Checking the power output from the charger through the port (disconnected from the mother board) i still get 0 volts through +VBUS line on USBc, I am assuming the charger gives 0 volts until it knows which power to switch...

Hi all, I have a 2015 Macbook A1534 Retina which started off having issues charging and receiving power from charger - now wont charge or receive 14.5v. I have tried another cable and charger with no luck, the little LED on the board (next to the battery connector) does not light up with no...