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Plugged the board and did the same behavior Fan at full speed No boot/apple logo Its getting 20V on the charger Removed the charger still fan spin Had to hold power to turn it off

Put everything back on the board apart of U3701 Plugged the amp meter on the USB-C so we have 20V Went to assemble the board on the case Now we still have 20V powering the board but the fan is spinning at full. I only did not connected the battery and no image on the screen

Removed U3701 and now we have the following on diode mode PP1V8_G3S = 0.285 PP3V3_G3S = 0.371 Which I think is perfect according to your openBoardData. Now what would be next steps put back the components which I remove and turn the board ON without this WIFI module since I do not have a...

Got it But the main question is. Should I remove this component for the short to be gone OR It could be the same as U8200 we are removing someone that is not the culprit and should search more to find the real one? Isn't it smarter to take a look around... maybe could be a cap attached...

Went to a friend lab and found what I think is the culprit I got a video if you want of the thermal camera. U3701 is getting hot and it actually have some variations of PP1V8_G3S and PP3V3_G3S underneath it. To be honest with you it start getting hot from the corner around R3702 and R3705 I...

Put it to 2V and still didn't find The only thing that I noticed is injecting voltage around U5001 to check around this area it goes to 3 amps Other areas are 2 amps or less does this say something?

Injected 1V on the line PP1V8_G3S and looked at all components and still didnt find a thing! amp consuption goest to 1.300a

DIODE MODE PP1V8_G3S = 0.000V (Looks worse than 3V3_g3S) PP3V3_G3S = 0.004V Can I input max 2V/3A on this line? Please guide on how to better setup my PSU and I will inject voltage on it. Also should I remove any component before injecting voltage like I did on 3V3_G3S?

I was following your guidance. But deiced to explore a bit around some componentes and found that PP1V8_G3S is shortened to ground also. Now what? Are we doing the wrong thing since the beginning?

I had thermal camera in the past and didn't think useful. Also I am using thinner instead of alcohol but it showed really well U6855 getting hot and drying the thinner itself. After removed this IC nothing else got HEAT. I will set to 4V/3A and check all of the rest BY THE WAY I removed...

I mentioned previously here that I am using 4V / 2A Consumption is around 1A when I am shortening to ground PP3V3_G3S PS: My PSU is max range is 35V/3.1A

Actually you told to not use at 3A because I could block the PSU. But anyways I made other questions and you didn't reply. What is your toughts on this?

Does make sense to think that TPAD_3V3_SPI_EN is OL because I removed U6855? I am really stuck with this Mac and need to solve this. Nothing heats with 4V. Should I put amps to 3A?

Since I do not have thermal camera. Shouldn't something heat and alcohol show it? Don't you think something related to U6855 could be the problem? TPAD_3V3_SPI_EN = OL and on the OpenBoardData = 0.590 However its not a short to ground.

0.003

Am I doing something wrong if I dont see nothing heating? It should heat instantly as it did with U6855 right? Images of the areas that I am looking PSU @ 4V/2A goes to 1.2A when shortening this line.

However nothing in this line is around the cpu heatsink

You meant 4V right? Yes I removed the CPU heatsink!

Wento to 4V the amp consuption goes to almost 1A however nothing seems to be heating. I already removed U8200 and U6855 Also removed C6856 thinking that could be it since I noticed U6855 heating once then it could mislead me and C6856 could be the one... but it's not

I increased to 2V and found some heat on U6855 Removed it and guess what the short still there. Really weird Was trying to find again on all the components connected and nothing gets heat. After removing U6855 the amp consumption with the short it's 0.350A Should I increase now for 3V?