BQ24193 capacitor shorted

Nintendo Questions Nintendo Switch
1

First of all: I know there are very similar posts all over the internet. However, I’m fairly new to diagnosing electronics. I just need some help in my sepcific situation.

I’ve got this nintendo switch. After opening it up, I immediatly noticed some corosion, but not much. I also noticed one shorted capacitor next to the BQ IC. I cleaned everything up with iso, attached the battery and charger and gave it a try. As soon as I pressed the powerbutton smoke came out of the area of the BQ IC and I immediatly disconnected battery + charger.

I then discovered the diagrams of the VSYS Rails with possible shorts by Calvin. My switch has all possible shorts depicted in that diagram. How do I continue? I have no heatcamera or power injection tool, only my multimeter.

2

I sadly can’t upload any pictures, I guess because I just signed up. The capacitor that I first noticed as being shorted and started this whole dilemma, is the vertical cap right between the IC and the coil.

3

Is it a v2 had-cpu-xx boad? Does it come with diode next to inductor?

4

It says “HAD-CPU-10” on the motherboard. Yes, there seems to be a very small diode next to the inductor coil.

5

check the resistance to ground on your short cap or vsys. I doubt is arouns 200 ohm and that’s normal reading

6

Well it shows 0 because its…shorted? I think I’m misunderstanding your point. My multimeter beeps on on both ends to ground. When measuring Ohm, it shows something like 0.1 on either end to ground.

7

0.1v or 0.1 ohm in resistance mode, they are different values

8

0.6 Ohm to ground and 0mV to ground on the shorted one.
On the capacitor above (which should work), I get 481mV and near infinite Ohm (or at least very high).