Do you have a coin slot yet or still the stock battery?
I bought one from this guy, best deal ever and you can even deal down with a best offer, but it's already at $8 shipped and it arrived pretty fast too.
http://www.ebay.com/itm/Sega-Dreamcast- ... Swxp9W4g3-
Battery clip holder and a new LIR2032 rechargeable battery.
Unscrew the 4 screws to pop the DC top off. Next the front area where the 4 controller ports are is a small rectangular board. Remove the 2 cables/plugs very slowly/carefully and then unscrew that and lift. However works best for you, heat the solder and pry the original battery metal (thin and annoyingly so for me) battery clip out. Clean area, slide new clip in, 3 spots of new solder, pop in battery. Then reverse your steps and button it back up.
Turn on, run system for 2 hours (run some CDs or whatever) and you're set. Ever fails again, no painful surgery just pop n' swap another battery in like 10 years.
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Anyway last weekend I got lucky with the Dreamcast stuff. I went to the flea I usually wouldn't do this time of year due to weather as I was out there driving by it on the way home. Have known this old man who runs a game/misc stuff shop in there for a long time. Saw he had some DC games, felt bad as they were thrashed. He figured they were ruined, long story short let me have them. Got 6 of them home, happy to report I recovered 5 of them into working order. Cases/games may not look the best on the bottom but I hand resurfaced them using my pinball novus1-2-3 kit.
Happy to find that Bang! Gunship Elite is pretty cool, maximum pool is bland but not bad if you're in the mood, and I'm not sure how I feel about SF Rush 2049 but it's alright so far. Also got Sarge's Heroes and Hydro Thunder which I didn't need (so I stuffed them on ebay for below 1/2 the going rate for someone not picky to play.)
Bang! is pretty fun, it's sort of like starlancer on DC/wing commander but has it's own driven story so you don't have all that pilot yapping and between stage stuff as it's more action oriented which is fine.