XPS 9365 crashes during Pre-Boot System Performance Check & starts reboots into loop. Can't boot from USB either.

Description of Problem:

The issue began last night after I used the laptop and drained it completely to 0% battery.

When turning on my PC, the dell logo appears, and then it automatically enters the Pre-Boot System Performance Check. It quickly goes through the checks and sometime early in the process, after about 2-3 checks (I think when testing memory), it crashes & the PC goes dark/black and then it automatically restarts the computer, entering a reboot loop. After the automatic restart, it usually doesn't get to Dell Logo, only a blinking cursor/apostrophe in the top left corner of the screen. It never gets to Pre-Boot System Performance Check again. And then it goes into a reboot loop. I can only get back to the Check if I power off the PC & turn it back on.

I THINK it crashes when it is testing the memory. But it flashes so quick, it's hard to tell and catch.

Other Noticed Things:

• When, trying to do a preboot diagnostic test through the BIOS menu. It also crashes during the test and enters a reboot loop.

• I cannot boot from a bootable recovery USB. I've tried two: the one windows creates using the Media Creation Tool, and one using Rufus. It's a UEFI bios, but I've tried the older BIOS type too. And I've made sure secure boot is off.

• It won't enter BIOS if I disable boot from HD and only try to boot from USB. I get "Preparing One-Time Boot Menu" after pressing F12, but the Dell logo only loads half way and then it reboots into the loop.

Things I've Tried:

1. Unplugged power cable, battery, and discharged PC by holding power button for 30 seconds.

2. Reset BIOS to default settings

3. Used Dell's Recovery BIOS.

4. Removed CMOS battery & reset CMOS/BIOS.

5. Created Bootable USB from Windows Media Creation Tool

6. Created Bootable USB using Rufus - both UEFI & BIOS types.

7. Created Bootable USB with Dell's Recovery & Reset tool

8. Entered Pre-Boot Check from BIOS & still crashes. I tried isolating it by turning off hard drive & processor tests. But it's hard to get back into it

Ideas?

• Would turning off the Pre-Boot Check avoid the crash and reboot loop? All the solutions online for turning it off, doesn't seem to apply to my XPS as those settings aren't available as options to change/disable.
• Anyway I can get windows to repair PC / troubleshoot like that can be done from the recovery USB?
• Any ideas on what is wrong? What to try? Is motherboard fried and dead?

Notes

• I'm trying to rerun the Pre-Boot Check, but edit which tests it runs and turn off memory tests.
• I'm going to try Memtest86 from a bootable USB, but I don't think it'll work since I can't get it to boot from a USB.
• I'm not a Linux guy or very familiar with command lines, but I might try booting some sort of Linux from a USB, just to see if it can boot from USB.
• This XPS has been nothing but trouble since I bought it. I prob won't buy dell again. Lots of troubleshooting other minor error stuff. Had to get the motherboard replaced bc the charging USBC port wouldn't make a connection with the charging cable - thankfully under extended warranty.

Thanks. I'd really appreciate any help.