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That is my current setup. As described above, I have no problem accessing dfu on the bare board by pulling SOC_FORCE_DFU high, and then releasing it once dfu mode is reached. The restore operation fails with the error code I noted. The board has a single USB-C flex connected and nothing else.

The keyboard is extremely sticky, I haven’t tried entering dfu with it, but wouldn’t be surprised if it needs to be replaced. Does it make any difference?

Okay, I finally got everything together for DFU, the progress bar got stuck at like 99% on step 4 out of 4, and after 5-10 minutes "Gave up while waiting for device to transition from DFU state to DFU state" with error code 0xFCA or 4042. I haven't found much information about this code. Does...

Yes, I also purchased a programmer at the same time, I just don't have time to dive into figuring that process out right now. Thank you for your help with this board.

That wasn't my exact issue, I tried multiple internal SSD's that had been formatted as gpt and MacOS Extended (Journaled) and they still didn't show up, unless I'm misunderstanding that shouldn't have anything to do with APFS? I also didn't have a macOS High Sierra installer on hand, and needed...

Well that was a nightmare, resolved now thanks again, here's some notes I took that might help others: Booted a GParted live USB stick and reformatted the internal SSD, which showed up normally, as gpt and hsf+ but there was no change in recovery mode disk utility, including when use from the...

Update: *sigh* now the SSD is not detected in internet recovery mode. I used a BIOS chip from eBay, the seller claims it is programmed with a clean ME and this device's serial. Could this be caused by an issue with the BIOS? Or do I have a secondary issue? The BIOS corruption occurred while...

Still need to reinstall macOS and test everything, but the BIOS appears to have solved the issue. Thanks!

Yes, I couldn't find anything on their site, and just gave your link a try but it says not supported.

Is there any way to tell if the device is in DFU mode without another working Mac to connect it to? Looks like I'll have to fix something else first and circle back if not. Or by try dfu, do you mean to do a revive/restore even if the device is'nt booting into dfu automatically, if it'll let me?

No dice, time to throw in the towel on this one, thank you!

820-01949-A board came in with liquid damage concentrated around U3100_W and _R. After cleaning up the area, freshening resistors, lifting and cleaning everything affected, etc. I had 3X ports at 5V 0.25A, and one looping with the same consumption, controlled by U3100_R. Replaced U3100_R to no...

CPU Core reads 0.0Ohms on the CPU side of the coils, and O.L. on the supply side (with the coils removed). Seeing as I don't see a capacitor or anything else heating up, is there anything else I should look at before concluding that the CPU is the source of the short? Is it worth getting a 20A...

Thanks for your guidance on this one, as the board has an overall "crummy" look to it, after testing with a new BIOS, is there any point is trying to heat up the pch a bit to burn out crap under it? Or more likely to cause other issues than help?

I've got an 820-01958-A with liquid damage around Q7065 and other parts of the board, but not under the cpu heatsink, that after addressing visibly damaged regions requests 20V and consumes about 70mA, but makes an audible clicking noise and does not power on. All major power rails are present...

No dice on U4910, and the IC is functioning properly if I force both of the inputs high. Zero visual issues around U4910 or R1618, checked for shorts, resistor values, and continuity all around both but came up empty handed. The voltages on pins 20/38 do not change.

Okay, I provided the system configuration I was using because I wasn't sure what was appropriate for taking these measurements. It sounds like you'd like the SSD removed and the trackpad to be the only peripheral connected to the board, so I've repeated the measurements with that configuration...

Yes, I'm aware of that, just wanted to provide you with the current configuration at the time of taking measurements. I didn't catch that pin 28 was SMC_LID and put two and two together yesterday, the board was in the device with the screen closed, checking again today with the board out of the...

Everything is disconnected from the board except the keyboard and magsafe, the power rails look good, I'm not totally sure what to expect from the later three pins. 1 12.5V 25 5V 27 3.3V 20 0V 28 0V 38 3.3V

I've got a 820-4924-A with trackpad click, but no trackpad movement, keyboard response, or caps lock light. The power button functions and can trigger SMC bypass mode, which does not help the situation, but the keyboard is otherwise unresponsive to startup combinations and the device will not...