To be honest I just wanted to test that I could so it since I had just ordered one and it looks to be placed perfectly. My issue now however is power isn't going past the first mosfet am I right in thinking the second mosfet is shorted since on diode mode it's showing 1.7 on it?

Hey there, so just to practice my soldering I replaced that chip. However, no power doesn't go past the first mosfet (as shown in picture) one end has 20 v coming in but 0 v coming out I checked the resistance on it using diode mode I get .300 and the mosfet after that I get 1.700. is one of these shorted now?...

How do I short my meter probes? And also sadly I don't have an adjustable power supply. From what I have so far would you say that chip needs to be replaced?

Also side question. How did you know to check LD05 and LD03 and not the other areas? Is it somewhere in the datasheet

LD03 for both 20K and 200 show 0.0
LD05 for both 20K and 200 go up and then just show 0L

​​​​​​Am I don't something wrong or is there a short?

Ok I will measure them later today. But if that is shorted I just need to change that chip? Is that worst case?

I had it set to 2M should I have it on 200

This is what I'm getting. Just to confirm and sorry for the dumb question but I need to be in diode mode correct?

LD03 = 1.1
LD05 = 1.3

I also put it in resistance

LD03 = 0.0
LD05 = 1.5

I should mention that no battery was in the computer when I got it. So there's no battery in it at all. Everything is straight power. Also I'm looking at the datasheet but can't find where it shows resistance for each pin

Perfect! Thank you for that. In your opinion would that be why the laptop isn't turning on?

Hey sorry to revive this post. I'm new to fixing circuit boards and am excited to learn. I just inherited a dead Y720 with what the previous owner stated. Only difference is he said none of that work and one day he opened it up and now it doesn't turn on. I narrowed down where the issue begins and it's here:

One of the MOSFETs (circled in green) input has 20v output shows 0. And then the chip in red gets really hot. So I'm assuming that's where the short is. But I'm not sure what the name of that chip is or if there is anyway to figure out if that is where the issue is.
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