So I picked up one of these to use as a Raspberry Pi alternative for some small IoT services around the house. I had a NVMe SSD in another system I should be able to drop into this and boot, which mostly seemed to work, but I was having some strange issues that took a while to figure out.So, out of the box, I went ahead and opened it up and unplugged the SSD included. I don't need Windows for my needs and would rather not have it numerated in Linux or anything, so I just unplugged it. I plugged my prepped NVMe in and it all seemed fine.Booted into the BIOS, went thru resetting some things, and upon save & resetting the BIOS... it wouldn't boot. I kept getting "RESET SYSTEM" messages and it just kept rebooting. I couldn't get it back into the BIOS either.At first I figured I did something wrong in the BIOS and tried to reset the CMOS, but that didn't really do much either. I was able to get into the BIOS once, didn't change anything, and it immediately started back into a RESET SYSTEM loop.I took it apart completely and noticed the Wifi antenna were seemingly damaged. It looks like there are a couple of places where the antenna has been stripped on purpose, exposing the inner metal shielding to the bare metal of the chassis. I didn't think it was likely causing a short but I did see some others reporting such a problem. I'm not using the wireless so I went ahead and removed it. Problem persisted.After a bit more troubleshooting I figured out if I plugged a second keyboard in and spammed F12 on both I was able to get into the BIOS, and from there I set the boot delay timer to 5 seconds... and it boots into Linux very consistently now.I say all this to hopefully help anyone else that picks up one of these for homelab type things: Ensure the boot delay timer is set, because it seems like the HP BIOS can't kick over to GRUB otherwise. Super weird, but hey, it ends up working fine.