Thank you for the help mon2 and reformatt.

For Dell latitude 7320/7420 the board looks similar to the 7530, and I checked the 5V rail of the USB and it is going to these, one of them is SLGC55544CV USB Charging Port Power Switch and Controller.
https://www.renesas.cn/zh/document/d...44cv-datasheet

I am in regret now as I am realizing that I might have been too hasty to remove the IC I removed, because I remember that I was actually reading 5V on some of its pins. But the overheating and the hissing was from it's circuit, so probably the IC wasn't bad.....

Hello

Sadly, I accidentally shorted the 5V power pin of the USB port to around 20V power, and the laptop turned off and will not turn on anymore. I hear hissing sound in the motherboard like there's a short circuit somewhere. I tried disconnecting and reconnecting the battery but with not luck, also on the USB-C power it is the same.

I did try and traced the 5V rail and I found this IC overheating. I did remove it after a huge struggle for long but the short is still there. Also the laptop still doesn't turn on and the charger light doesn't light when plugged..
...

Hello guys,

If someone could help share Latitude 7530 schematic.