I bought a unit from eBay marked for parts. When turning on, the screen flashes and then turns off. Also it is making a funny noise while powered on. Seems someone tried to repair the speaker cables and soldered them opposite of what they should be. I asked the kind folks at http://reddit.com/r/retrobattlestations for advice. Stay tuned!
Images of the teardown below- first step will be blowing all the dust out!