If you have 1V on both sides of the fuse the no the fuse is not the problem. 1v on PPBUS_AON in my experience is a short circuit somewhere downstream like P3V8_AON that you mentioned or U5200 doesnt receive something it should to release 13V.

As with every Mac board, you won't get anything if you don't have PPBUS_AON or on older boards PPBUS_G3H, measure that, if you don't have PPBUS_AON its created by PPBUS_AON_REG from the fuse, its just called that before the fuse on the output of the U5200.
You should get 12V-13V on PPBUS_AON, if you don't have 12V then PP3V8_AON won't be created as the PP3V8_AON maker its input is PPBUS_AON. 3.8V AON is used on the USB-C chips and thats why you don't have 20V, Magsafe is the same, look at it as a glorified USB-C port.

What is the voltage ov PPBUS_AON_LUXE?
You should have 15V on PPVOUT_LUXE, but 14V is also okay.
Also the chip has an input from 5v_S2, you have 2 0402 caps near the backlight chip that you can measure, Those macs are prone to liquid damage exactly on the connector or backlight chip, also worth mentioning is the TCON on the display might be at fault, did you try with a known good screen?

Hi guys, i got a Dell G5 LA-K455P to repair, the guy that owns it said it just turned off, i did the following and measured the following:
Inspected the whole board visually first, then under the microscope, nothing out of the ordinary.
Got the fans re-attached and LAN Board and USB board for power button and indicator LED.
When the AC is plugged in LED doesn't do anything except when i press the power button it light up orange and when i let go LED doesnt shine anymore, i tried holding the button for 30 seconds, no 3 blinks.
Measurments:
+19V_VIN : 19V
+19VB...

Sorry for the late response and also thank you for helping me, i measured LT400, LT402 and LT403, so PPBUSAON, PP5V and PP3V3, i don't have a single voltage...

Yes, Everything except the board works, i took a whole topcase that i know is good and put the board in there...

Board is "working", its stuck in Restore, uts drawubg 20V and from 0.20 to 0.9A as the battery is full...

I just did that, IPD_SPI_INT_CONN_L is too low, i then inspected RT364 which is 100K ohms and its good, also UT365 which i replaced heroically and its still the same, then i inspected RT363 which is 10K ohms and resistance is also good. After those components it goes directly to the CPU...

Yes, all are from A2337, the original trackpad that was on the device i connected it to another board and it works, so its 100% on the MOBO.
I measured every pin on the trackpad connector and nothing is shorted...

No liquid damage, i inspected the whole board, fans are not running at high speed, both NAND's look good and get 2.5V, not shorted.
Also connector looks brand new, no gunk or bent pins or oxidation, as per my post i replaced both trackpad and trackpad flats that are known good, also i inspected the board that connects keyboard and backlight with the trackpad flat, also tried replacing that little board but outcome is the same...

Hello all,

I am repairing a Macbook A2337 and i have a problem
The Macbook is stuck in restore as someone before me tried a DFU restore and bricked the device, now i can't do a restore as AC2 throws error 1 which is related to the trackpad.
When i turn on the device i get the trackpad click for a few moments and then nothing, i tried 7 trackpads and 7 trackpad flats, i know all 7 are functioning okay, especially one as i use it for testing and DFU restore.
I inspected the whole board and everything seems fine.
Can anyone help me as i didn't fiddle with trackpad...