One of my many Raspberry Pi 4's in one of my clusters recently broke down. After some troubleshooting, I was surprised to find out, that the power circuit on the board was actually toast. I have no idea how this happened but now I can no longer power the board via the USB-C plug.
From the schematics, I could see that these pins lead directly to the 5V0 and GND rails "behind" the VRMs and caps in the power circuit of the board.
Since I don't have another stabilized power supply I can spare and I need the Pi up and running asap, I'm asking whether I can power the Pi via the GPIO +5V and GND using the official USB-C adapter (by just soldering a USB-C jack onto them) or if that would lead to damage or even catastrophic failure over time.
Soldering extra caps onto the "auxillary" USB-C jack is no problem if necessary. I just wanted to ask some people with experience and maybe even better ideas, before I try something untested and fry an otherwise good Pi 4.
Edit for clarification: With "power circuit" I mean the MXL7704 PMIC and the caps right behind the USB-C port. Although the PMIC receives input voltage, its outputs are all on 0V and it gets up to 75 degC hot. I could not identify any shorts on the board.