I just got a brand new Lenovo V15 G2 ALC laptop yesterday. Came with no OS. I installed Ubuntu from a USB drive, used it for a few hours and applied some updates to the programs that I installed, after which I did a reboot. Laptop went into trying to connect via PXE boot (IPv4 and 6), after which it went to a "boot options" screen and wouldn't load the OS back up anymore.
I did some digging, turned some BIOS stuff on and off - changed BIOS time to the correct one, even used the NOVO button (as per the Internet tips - spent like 8 hours trying to fix this; I can play a "live" version of Ubuntu via USB but when I go to check for partitions via terminal all I get is the USB drive, and no Hard Disk detected), but to no avail - in BIOS, it says that my Hard Drive (which is a 512GB SSD) is "not installed". I also tried to install a fresh Win10 from the USB, same stuff (also tried to see if there's a hard disk via cmd which is the part of the installation of the Windows OS, still nothing, just shows my USB as the only drive).
Pic: https://i.imgur.com/DJ0ePAP.jpg
I'm starting to suspect the problem is with the hardware, but asking here first for any tips. I'm under warranty still.