I've been working on the Star Wars I got in a trade (THANKS Kurt!) and It works pretty good except there are no Tie Fighters, and most of the time, no Death Star. Now, I've narrowed it down to. SYMPTOMS: STAR WARS ONLY: When game first turned on, no starfield background pattern (noticable during demo display). When game is played, everything appears normal until you select a difficulty (deathstar). Once your ship leaves the menu, no starfield background nor enemy attackers (tie fighters) nor deathstar ever appear. Gameplay is otherwise unaffected (you can aim, fire, etc). SOLUTION: Check the four 18-pin socketed ROMs 136021-110 through -113 at locations 7H, 7J, 7K, 7L in the middle of the main game board. At least one of these is bad. These are 1024x4 bipolar 82S137 (Signetics) PROMS which contain the microcode for the math box. In my case -112 was bad. Frys, Jameco, and JDR Microdevices sell these PROMs. Does anyone have any spare 82S137's I can use before I depart Utah again? This game is wonderful besides that ;)