determine what sharing services are running

Hello. I've got a tricky problem.

I have an old G4 tower and no monitor for it. I wanted to go through old files and I used to just login remotely (screen sharing, SSH or AFP) and do what I need. I don't know why, but now no services seem to be running. I know for certain that the computer is connected to the LAN network.

Basically, I'm trying to find out what services may be running. I'm not trying to get past any security, just access my files.

If it's stuck at the login window, will no sharing services start? I guess not, since no user is logged in.