Recent content by mgladin

I did some reading to figure out what I needed to swap, and it looked like I needed to change U2890. Doing so did not fix the issue, I tried with every board I pulled the CD3217 off of.

The only information I have is that the device stopped charging. I also have not done that. Is there a resource you could recommend to guide me through the process?

I have an A2289 that I am working on that came in for data recovery. I plugged in the MacBook and it was charging at 5v at .28a, so pulled out a donor board and swapped out the chips on both sides. Issue did not resolve itself, so pulled them off a different board and tried again, still no...

Ok, thanks for the info. I will see what I can figure out. Is there a cheatsheet or something that shows what ICs need programmed if new so I know to pull them off a donor board and I don't run into this again? Edit: Also, is there a good place to pick up donor boards other than eBay?

No, I didn't see anything stating they needed to be programmed before use. I used the only exact-match donor board I had when I did my last repair and it seemed to work just fine, so that along with no notation when I ordered led me to believe it was a simple swap. Does the donor board need to...

New, not removed from a board or anything. I think I now can assume they may need to be programmed?

I ordered new ICs. I also put them on in the same orientation as they came off, but not sure what MLB means.

Greetings, I have a MacBook I am looking at that is stuck at 5v. I just had the same board in with the same issue a couple of weeks ago, so I checked around the CD3217 ICs and found a short on C3208 (PP3V3_UPC_XB_LDO), so I removed the CD3217 IC and found the short was removed. I proceeded to...

I recently had a MacBook Pro do the same thing, and it was the USB-C Controller. For your model, I believe it is the CD3217B12 IC. There should be two, and both should be replaced if that is the issue. I would check around there.

Thanks for the input, that site is new info to me, was already super helpful on another repair.

Greetings! I have a MacBook that does not want to power on and is cycling total charging wats from 1W up to 10W and then it resets and starts the whole process over again. I have replaced the entire bottom case assembly with a known good to ensure there were no issues on the parts side, and the...

The issue resolved itself after I replaced the trackpad. My best guess is it was damaged when the last shop initially replaced the battery. Thanks for the info! Did not know the trackpad was required.

I don't believe so. We have left it unplugged and did prompt to boot through only the charging port and the issue still exists.

Ok, so I know this has taken some time, but I am back again, this time with more info. I tried to restore from DFU mode but was unsuccessful. The customer requested a new motherboard, so we ordered one. Came in, did not work. We sent it back and ordered a new one, same issue. We tried replacing...

PPBUS_G3H starts at 10.3ish volts when it starts charging and goes up to 10.9-11v at its peak while stair-step charging occurs through the charging port. When the stair step charging resets, it will jump to 12.5-13v on PPBUS_G3H and then drop back down to 10.3ish volts and start the process over...