Remote login (no video-out)

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http://forums.fedoraforum.org – So I've got a problem with a computer that I'm working on. I think that it has a hardware/video problem (BTW it's a on-board VGA mother board) but I really don't want to buy a GPU just to figure out that it's really not a video problem. the machine itself will start up and run but the monitor is not detecting a signal and I know that the monitor works because it works with other computers. Now my question is: is there a way to remote login (like SSH) into the computer even though it previously was not set to accept SSH? It's basically has a standard install of Fedora 11. Any ideas? Thanks (HowTos)