Since it is still under warranty, you need to contact Dell.
I plugged in my external hard drive and my laptop shut off. I’ve tried to troubleshoot the problem by draining the AC Power and unplugging everything from my alto top, then turning it back on but it still won’t turn on. I just bought this laptop in December 2021 and it’s only January 2022. Nothing is working and I don’t know what to do. Why is my laptop not turning on? 
Inspiron 7506 2n1 won’t turn on anymore