If I try to boot up while the monitor (a Dell E550 CRT) is turned off or not connected (because I have the KVM switch connected to my other computer), things don't work properly. When I do turn on the monitor or reconnect the monitor to the computer booting up antiX Linux, the monitor stays dark, and all of the LEDs flash in unison.

I don't have this problem in other distros. And if I have the monitor on while booting up antiX Linux, there are no problems. It's not a major issue, but I'd like to resolve it for Swift Linux.