I'm back to just say thank you to all of you. The Macbook is live again!
After putting back the knocked off caps and resistors and replacing the bad CD3215 with a working one (easier said than done), the macbook is finally back at 20V and booting up.

This link also helped me a lot with better understanding exactly if the CD3215 was bad (I succeeded only with the 3rd replacement I got from eBay) along with the above one for CD3215 Bootup:
- [URL]https://logi.wiki/index.php/CD3217_and_T2_Power_on_Sequence[/URL]

On the journey I've ruined:
- the usb-c connector...

Small update. I followed the tip and bought a cheap A1989 donor board (2018/2019 MBP 13") and got the donor caps. Now the board is taking 5.2V and 0.27/0.25A, so not completely dead anymore. It doesn't work yet because I have not yet restored the CD3215 chip.

But meanwhile I've tested that PPBUS_G3H now has 12.26V, not 12.6V, which is expected since one UB400/CD3215 is missing and thus T2 is not booting (AFAIK). I've also checked that PP3V3_G3H_RTC_X has 3.35V measured both in CB300 and CB400. So all seems good.

The remaining issue seems indeed to be the UB400 chip....

I'll buy a donor board then as suggested. My biggest worry now is how to get the CD3215 IC back to the board. I need to either trust buying it online, already reballed, or learn to reball it myself right?

Quick question: how do I choose which cap to pick as far as they seem all to have the specs specified by Apple?
E.g. [url]https://www.mouser.it/c/passive-components/capacitors/ceramic-capacitors/mlccs-multilayer-ceramic-capacitors/multilayer-ceramic-capacitors-mlcc-smd-smt/?capacitance=22%20uF&case%20code%20-%20in=0805&tolerance=20%20%25&voltage%20rating%20dc=25%20VDC[/url]

The spec on the board schematics is 22UF 20% 25V X5R-CERM 0805-1.https://Quick question: how do I cho...25%20VDC[/url]

Thanks to all of you for the tips. I was able to find the shorted cap indeed!
Using a 9mm nozzle, max air pressure + some flux was very effective to desolder any component other than those two fuses at the center of the board. But actually keeping them soldered was useful as I injected 1V and 3-5A and tried to find where it was hot. It was very difficult and I had to take some wrong attempts, but eventually I was able to notice a barely noticeable warmer temperature around C6503 near the right audio J6500. It was also indeed in the area where I initially noticed a warmer capacitor C7605...

I guess I don't have the skill. Tried with some microcontroller boards and was easily able to desolder capacitors, but I just can't get it moving at all with the MBP board.
I've first removed the heatsink pipes over the CPU to remove dissipation. Tried with first preheating the board at 80°C with the hot air gun, then max air pressure and 480°C, but the fuses just won't budge. Tried even with soldering iron at 360°C with flat tip. Won't budge either, just did some mess with the solder that I was fortunately able to clean away. Used flux in every try. I don't have an underside heater unfortunately....

Dumb question: so I got my flux today, but I was not able to desolder the fuses with the temperature set at 400°C. With the thermometer with the laser pointed at the fuses, I would get at most 110°C. Stopped when I was hitting it for 2mins straight and noticing the plastic wraps of the memory chips starting degrading. I also noticed the heat dissipation pipes getting hot as well. Should I had them removed before trying to desolder? So that heat doesn't get dissipated....

Resistance to ground of both F7000 and F7001 are 0.6/0.8Ω, but also resistance across is the same 0.6Ω roughly. (I've set the multimeter to 200Ω)

Hi, thank you for the reply.
- Fuses resistance are 0.7Ω
- Not sure if I read the board view correctly, for the enable voltage I measured PPDCIN_G3H_CHGR at C7029 and C7042. Measured 5.17V. Will attach board view of that page.
- Tried to measure resistance of R7061 and R7062 as suggested [URL="https://repair.wiki/index.php?title=MacBook_Pro_A2141_Not_turning_on,_0.00-0.05a_current_draw_at_5V_repair&veaction=edit"]here[/URL] and measured 1.2Ω at one side (CHGR_CSO_R_P) , 2.3Ω at the other side (CHGR_CSO_P). Was not able to measure resistance of R7021 and R7022,...

Hi everyone, this is my first time trying to repair my 15" MBP 2018 A1990. I've been watching logic board repair videos for a long time so I wanted to experiment with reviving my own MBP, board number 820-01814.

This is all the information I gathered so far:

- All USB-C ports are dead with 5V 0A, none of them loops

- Weird fact: when charger is connected to the port corresponding to UB400 and I try to measure the volts at CB401, the charger is restarted. It happens only with that port and UB400. CB401 is not shorted. I don't know enough to explain this....