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OK great. I'm going to need to practice some on my junk board before I attempt this removal. I'll try to watch some videos on this. If there's any common resource for proper technique on this that you usually direct people to, let me know.

Position Voltage (V) C7834 1.25 C7880 2.64 SMC_PM_G2_EN (at R8110) 3.42 PM_BATLOW_L (at R1451) 3.35 SMC_ADAPTER_EN (at R5185...?) 0.00 PCH_INTRUDER_L (at R1401) I saw 2.39 at first (maybe a mistake?), but now I just see 0.20 RTC_RESET_L (at C1531) 0.26 PCH_SRTCRST_L (at...

Correct, still no voltage at L7660—I have just now checked again; the board is out of the case, connected to the charger, and not connected to the battery; when I check voltage at other locations in this current configuration I do get readings (e.g., L7030 is still giving 13.11 V). Position...

COIL DIODE MODE READING (in dV I guess) L3500 0.172 L8410 1.036 L7030 0.269 L6900 0.334 L7600 0.392 L7660 0.325 L7700 0.241 L7430 0.005 (and my particular multimeter beeps—I'm sorry, I'm pretty new to this...) L7420 0.005 (also beeps) L7410 0.005 (beeps) L7210 0.012 (beeps)...

Ever since you asked for checks with the battery connected, I have had the board partially back in the case. For the diode tests you just requested I will take the board back out of the case. Basically all I am doing at this desk/workspace is working on the computer, so I think the answer is...

Doing a check of voltages at all inductors of at least the size of L7660 on the same face of the board, I only get readings at L7030 (13.11 V). Although a reading of 3.36 V was previously observed at L7660, now I am getting 0 V. One measurement made sometime after getting the initial 3.36 V...

Yes, for example I get 13.11 V at L7030. Should I check and report the voltage of all inductors, or was this just a spot check to set me straight when I was incorrectly claiming 0 V in once place?

Yes, I forgot I had unplugged the charger when I went to check the other side; I made an edit but you were very quick in responding, which I appreciate, but I'm sorry I wasn't quite fast enough to save you some trouble! Re: Cardinal directions. Understood. Sorry about that.

Here's an image clarifying what I mean.

With battery and charger connected, I get 3.36 V for 3V3_S5 measured at L7660. EDIT: Actually, possible correction (?) - I get the 3.36 V reading with red probe touching "North side" (relative to orientation in attached image from board viewer) but 0 V when touching the "South side" of the "box"...

Ok, I made sure that the screw for the battery contact was tight and that the battery data cable was correctly connected. I think they were in an appropriate state when I check the "with battery" conditions before; when I check the meter again in this latest state I get all the same readings...

Here is the board partly back in the case. Non-reconnected things are circled; is it in an adequate state for doing the "with battery" checks you asked for?

When I connect the battery (assuming I have adequately reconnected the board, which is not certain), I get the same value on all four ports, but this is with the charger plugged in (not sure if that's correct or not). When the charger is not plugged in, meter does not turn on.

With no battery, all ports show same value; images for other three ports are attached.

Here is the reading on the usb-c meter. Edit: The image is from when it first turned on. The temperature reading rose to like 23 °C over time.

Got it; thanks! Under these conditions, PPBUS_G3H is 13.12 V and PP3V3_G3H is 3.44 V.

Like, can I simply reattach this (see pic)?

In order to connect to power and check the voltages, I will need to re-attach my board to the case, right? Is there a way to minimize how much I reconnect? Like, can I just reconnect the USB ports on one side or something? Or is that bad practice?

Ah yes, I lost track of things and derped out--was doing voltage mode without charger connected. Running diode mode, I get 0.365 V for PPBUS_G3H and 0.331 V for PP3V3_G3H.

OK, great, I found that position and I checked the voltage relative to ground using red probe contact with the "top" (relative to the orientation in the schematic screenshot attached) side of L6900 and black probe contact with the edge one of the holes through the board for screws that go around...