Alright, looks like I may have found a way to fix it. It appears that this probe's USB drive got corrupted. I pulled the drive, plugged it in my computer, deleted all of the partitions and re-created a single 8GB FAT32 partition then put it back on the probe. Once it booted with the re-formatted drive in the second light got to flashing instead of being stuck on. After a few minutes of that (I assume the probe rebuilt the drive for what it needs) the probe rebooted itself and it now seems to be behaving normally, the third and fourth lights are flashing the way my first probe was when I first connected it and it requested (and received) a DHCP address from my server. I guess I'll see in a few hours whether this takes. Sent via RIPE Forum -- https://www.ripe.net/participate/mail/forum