Why aren’t my servers powering on after moving them?

I've been in IT for about 30 years, and I'm stumped on this issue. I have three HPE ProLiant DX380 Gen 10 servers, which are similar to DL380s but come pre-loaded with Nutanix. After moving them from our data center to our headquarters—about 38 miles away—I set them up in a rack and plugged them in, but none of the six power supplies show a green light indicating they're receiving power. I've tried switching cables, outlets, and power supplies around, flushing capacitors by holding down the power button, and checking for loose parts inside the servers, but nothing seems to work. I'm reaching out to the sysadmin community for help with this puzzling situation. We don't have active support on these older servers yet, as they're intended to be a backup cluster once they're operational.