removed pu200:
1=130k
2=40k+
3=ol
4=ol
5=10k+
6=133k
7=6k+
8=5m
9=ol
10=ol
11=20k
12=ol
13=ol
14=ol
15=0
16=2m
17=6m
18=nc
19=ol
20=35k
21=ol
22=ol
23=1m
24=35k

mon2 everything around the usb ports looks fine. what are load switches?...

pq100: G = 8.27v | D = 19.52v | S = 19.52v
pq100: G = 8.27v | D = 19.52v | S = 19.52v
pu100: 2 = 41k, 3.43v | 13 = 91k, 3.09v | 22 = 82.6k, 19.51v
pr102: 0.01ohm, 19.52v

resistance measurements were taken with power off.
i noticed a little more corrosion on pr910 and pd904 but hadn't eaten into anything that i can tell. looks battery related, could it be triggering protection?

it was working yesterday, i opened it up and saw this mess. boardview and schematic uploaded for convenience.

PU200
pin 17 vreg5 = 0v ~ solder joint was corroded and flicked right off with my probe, was able to get clean and reflow, rest look fine.
pin 8 vreg3 = 0v
pin 13 en = .2v
pin 1,6 entrip1,2 = 0v

b+ and b++ = 19.5v
+5valw = 0v & 25+ohm to ground
+3valwp = 0v & 25+ohm to ground


i cleaned the board up just a little and can get more pics.​
where should i be looking? thx...