D4 pin in the picture
0.7V does not consititue a logical high afair, but rather 1.8V.
I’d check your other rails are coming up following prompting the console to boot at the inductors surrounding the main PMIC, if your not getting them then you won’t get your 3V3PDR
If your not getting them thern following connecting a USB cable it points to M92/USB issues or issues with their surrounding components. I’d also try promting the console to boot with the power button and bttery connected and checking those rails once again.
To anyone else, the image posed above (by me) is wrong and is not a proper identification of the chip and was my error, though the pinout is almost the same.- the chip is RP602Z330C-
@Severence
Thank you for your comment.
So, I need to check 1V8PDR. Do you have any recommendations for where to start to check?
I would suggest measuring resistance to ground on the coils around the pmic.
As mentioned, checking the voltages following prompting the console to boot (try USB and failing that the power button with battery connected) at the main max PMIC on the surrounding inductors, if your not getting the voltages (incl your 1V8PDR) then most likely an M92/USB related issue.
As Insomniac mentioned you can also measure the resistance to ground on the inductors surrounding the PMIC which is good as a matter of course, which will let you know if something is dragging down any of your priimary rails, though at this stage I don’t think that’s your issue.
@Insomniac @Severence
Thank you for advice. I’ll check what you mentioned.
I’d like discuss with you when I find something.
@Insomniac @Severence
I’m still measuring components around the PMIC and I haven’t found any strange values for now.
However, I get 1.8v and 3.3v (Eventually) at rare probability.
They are gone with unplugging USB-C cable.
Do you have any idea about the symptoms?
Sorry I don’t really know what this means, I guess you saying they are present but intermittent?
If the battery is connected they should remain, if your finding they aren’t then I would be looking at checking your battery, battery connector etc
If you were saying the rails were intemittent above then these battery related issues (and a dodgy USB connection) would likely also be the cause
@Severence
Sorry for my bad English.
I mean I get 1.8v at random probability when I plug in USB-C cable.
otherwise I get 0.7v on 1.8v rail.
I measured voltage drop around two MAX ICs. I found out that some points are different from @Calvin 's map.
But, I don’t know what this means.
Any advice will be appreciated.
If the battery is connected, following prompting the console to boot the rail in question should be 1.8V constant, if it’s random, then it indicates either dodgy USB port and/or dodgy battery connectpr
I’d verify the USB with a breakout board and ensure all lines have continuity to the destination/s
Red probe on ground for Calvins charts.
Though I would advise you measure the resistance to ground on the surrounding inductors instead.
@Severence
I measured those values with the red probe on ground.
however, here’s the resistance of the inductors
Two inductors are located above the max77620a shows resistances over 1k, are they normal?
if they’re I’d like to replace the USB port.
and I found another capacitor is missing on the EMMC module.
If the board is unpatched I would run the Biskeydump payload and ensure you get valid BIS keys, the missing cap might be indicative of prior EMMC IC rework
Your reading of 2.5K on your 1V8PDR seems low, but it’s pretty typical for some meters to show wildly different readings here, I would verify this reading against another known goood board
Pointless at this stage, power button and battery should provide those prior rails at a consistent voltage following prompt to boot, if it doesn’t then as I said… battery connector/fuel gauge issue…
I don’t have another board but a tester.
left inductor gives me 800k at the start and gets increased to1400k and right inductor gives me 20k at the start and gets increased to 38k slowly.
I measured the inductors again with my multi tester which is used for the first measurement. and the left inductor mostly shows 3.3k but sometimes the value changed (8k ~ 17k)
However, I’ll wait for the missing capacitor (I ordered) and then continue on this.
The missing capacitor was 0402 4.7uf and it was the cause.
@Severence @Insomniac
I appreciate you for the advices.
Ahha! Good find! Glad you got it working 
Good stuff 
Though, this is simply a bypass cap and shouldn’t ordinarily prvent boot if it were missing, maybe heat in the area resolved an IC issue
To be on the safe side I would probably back it up if you can
Apologies for replying to an old thread,
I have a switch with with no 3.3v going to pin6 of the m92t36 and also no 3.3v to the p13usb.
It draws 0.43 amps @ 14.5v
With battery connected and power button pressed I am getting 1.8v and 4.2v around the EN IC but no 3.3v output.
What capacitor was missing? Can you scend a picture
Also in diode mode I get low readings on pin6 of the m92t36 of 0.042.
Between GND and Pin 6 of the m92t36 I’m getting 49ohms
short on 3.3v line then. remove big cap under PI3USB and see if short gone