If your Nintendo switch is not charging first thing we do is check the cables and then the charger port if they look good we proceed to second diagnose.
We have Diagnosed the charger port under the microscope and everything looks good.
Next thing to look for, is there any shorts around the charging IC as show in the video, we have found that one capacitor has a short so we remove the IC to see if the short has gone.
Once the short has gone we know for certain that it was charging IC that was the problem.
Replace it with new IC chip and VOILA you should be good to go.
Now the Nintendo switch should charge perfectly.