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Fair enough, thanks for your help

Yes, did that from the beginning, no change with SSD removed. I think so as well, but any way to diagnostically confirm that the cpu is dead?

Just left it in the exact configuration you requested for 5 minutes, nothing. I agree, I haven't seen this behavior before on this model AND had correct vcore, not sure what to think. PLT_RST_L goes high as soon as the USB-C ammeter jumps up to 20V, and remains high indefinitely.

I've already done so, the board hangs at 20V 0.4A after a few seconds, no activity on anything connected. Do I need to leave it for a significant period of time (more than a few minutes) for this test?

Got a replacement TL866II PLUS programmer, much easier to use when it's not defective. First I followed the instructions below to clean my ME region, no changes observed afterwards https://logi.wiki/index.php/Clean_EFI_ME_Region Then I flashed this BIOS image with a clean ME region that I...

This whole BIOS programming thing is going to make me loose my mind. I bought the TL866II PLUS https://www.amazon.com/gp/product/B07CQQBGVK/ And a WSON8 adapter board https://www.amazon.com/gp/product/B08VGVBWNP/ And got the official software from Xgpro, plugged in the device, successfully...

No blinking light activity on a thumb drive or external SSD. No external video output. External video test procedure: Place board in housing for hall effect sensors, with no flexes connected, connect USB-C power and USB-C to HDMI adapter while the lid is open, wait 30 seconds, close lid, image...

All three phases are stable at 0.709V

Board hangs at 20V 0.4A after a few seconds indefinitely, or 0.5A when installed in the chassis with only the battery disconnected. All major power rails are present, trackpad clicks, no light on caps lock, no response on display. No signs of liquid damage. I'm often unsure where to start...

I hear you... If I transplant the T2 from the donor board, could that theoretically work? I see so many of these newer boards dead in the water and would like to raise the repair rate even if it takes throwing in some time and practice at NAND and T2 swaps, in particular this board is work...

Any way to diagnose this or make sense of those error codes? Can I replace T2?

Unfortunately I'm stuck in DFU after the NAND transplant, here's what I did: -Verified that no NAND power rails were shorted on the donor board -Replaced U9080 on the customer board, verified that all NAND voltages were now stable -Moved 6x NANDs from an identical donor board with the same size...

So you would recommend just replacing U7800?

Should I just replace U7800, or is there a more logical diagnostic step I can take first? If T2, can I replace without data loss or are the encryption keys onboard?

Haven’t actually verified clock lines with a logic analyzer, but otherwise yes

Yes. VOUT_RTC 3.36V

I'm not sure, unfortunately I didn't check this between the dfu operation and CD3217 work, but my guess is that I lost 20V after the dfu revive attempt, as my soldering doesn't often cause issues and I redid the CD3217s more than once with identical results. I did the following: -Replaced both...

According to the power on sequence document for this device: https://drive.google.com/file/d/1oBr-qxYVfghYimgX6pwkNbwSjpQfYbKq/view PMU_PVDDMAIN_EN is supposed to go high before anything in the SSD 4 LANDING and SSD 2 LANDING sections. However, it fails to ever go high. My question is, how...

Also, can you elaborate on the "partially" with regards to the CD3217, is there something I can check? This customer is extremely interested in data recovery, so I want to explore every possible avenue.

I don't understand how the problem could be SSD related when the SSD is not even powered yet when PMU_PVDDMAIN_EN fails to go high?