Dreamcasts are wierd machines.
One day I blew mine up (plugged my UK ps2 lead into the back of my Jap dreamcast by mistake, doh!) turned it on to see the swirl logo start up followed by a really loud popping sound and smoke pouring out of every vent, Turned it on a week later to find it worked fine! (this was a year ago and it's still going strong)
I have heard of machines that have stopped working for apparently no reason, only to start working again at later dates so you may be lucky.
Alternatively have you tried loading games with a Utopia boot disk? This is what most people used to play imports on their UK dreamcasts, you should be able to download it somewhere and burn it to cd.
Edit: Ignore everything Ive said Ive just realised you are talking about the Saturn. :blink: , Man I should lay off the beer :unsure: