Quoted from jfh:
Welcome to the club!
The LEs were produced early and most of us had similar problems. Take some time and read through the thread and you'll see all the issues addressed. Before you do anything further, go through the game and tighten up screws, check for other missing parts, etc. make sure no cables are wrapped around or interfering with the turntable. All of the problem areas are documented earlier in the thread.
As frolic mentioned, Stern will send you a ramp fix kit and replacement (riveted) Batmobile spinner disc. However there is a better replacement after market ramp coming and using yelobird's Batcave spinner mod (and getting the much nicer Batmobile) are better options.
Here is my list of suggested mods. I'd add the Batcomputer cover set to those (released after I made the post). You will notice the mods for the turntable the most, so the Atomic Pile and Batcave mods along with one of the phone options are almost "must have" mods. Consider a Cliffy set as well.
Is yelobird's atomic mod different from the mod couple one or is that the same person? I've only seen the mod couple mod.