Recent content by palmtree

Disconnecting sensor I don’t get black screen when tilted forward, but no sleep when closing screen fully. I’ve suspected sensor from the beginning thats why tried a second one with same result.

A2681 initially had a display problem; the screen would turn black when the lid was halfway closed, and occasionally it would turn black on its own. Previously identified by Apple as a malfunctioning display. We swapped out the screen for one from LaptopScreen.com because we had never...

1.4 ohms. Pin 1 was open. Injected 1v/1a

F7000 both sides short to ground. WIth F7000 removed resistance to ground on F7000 Pin 1 is OL and Pin 2 is 1.4 . If I inject voltage into pin 2, nothing on board gets any thermal reading except Q8102 chip itself.

I may have found the real cause. If Im right, this could save alot of people headache (and money by purchasing the wrong trackpad replacement) After a lot of digging, I think I finally figured out what’s been happening. Turns out, the A2779 model with the M2 Pro chip uses a slightly different...

ACT_GND checks out – trying to confirm if the trackpad was the real culprit Just to clarify and correct my earlier posts: I’ve confirmed pin 37 on JT400 is ACT_GND, and it’s properly grounded There’s continuity between that pin and other chassis ground points With the trackpad and flex cable...

I "think" Ive narrowed that pin down to pin 37 on JT400 which is a ground ACT_GND.

Quick update — I’ve now gone through 3 trackpad flex cables and maybe 3 trackpads, and I’m seeing the exact same pin burn up every time. It’s always the same spot on the flex cable, but just to clarify — it’s the trackpad-side connector that’s burning, not the JT400 (board-side) connector. This...

So after reinstalling the board, Im getting a consistant 5v on PP5V_S2_TPAD_CONN and PP3V3_S2_IPD is getting 3V. Could this be firmware rejection? If not, can you suggest the next step? Just for the heck of it, I removed LT400 and bypass with jumper wire. Still no keyboard, no trackpad, but I do...

I just double checked again for sanity reasons....with the board in the palmrest, i measured 3.3v previously, but with the board out it measures 5v. Maybe i wasnt making full contact with my meter previously? idk....but now im getting 5v. So with that in mind, Ill put the board back in and...

I should clarify, at pin 17 on JT400 PP5V_S2_TPAD_CONN I get 3.3v, but at LT400 that same rail I get 5v. How is that possible.

all PP3V3_S2_IPD = 3.3V but PP5V_S2_TPAD_CONN = 3.3V instead of closer to 5v

Got a 2023 14" MacBook Pro (A2779, board 820-02841-05) that came in with liquid damage affecting the keyboard and trackpad. It still boots fine, screen is good, external keyboard and mouse work no problem. I replaced the keyboard, trackpad, and trackpad cable with new parts. Trackpad clicks...

What coil number was bad and how did you find it?

Maybe I didn’t explain myself clearly. Both capacitors that I injected voltage into at first just happened to be the faulty capacitors and didn’t show as hot on the thermal camera until I injected voltage into a good capacitor further down the line. Why that happened, I have no clue. At any...