The Aux lamp driver board in Kiss can cause some pretty-wacky problems if it isn't working correctly. Stuff I wouldn't have thought would have anything to with it.
Mine would start-up nice and play great. The K-I-S-S would flash properly and everything would function 100%. Then after about ten minutes the machine would go berzerk. GI would go out, displays would go flaky. Really bizarre stuff. It had me stumped for quite a while until I removed the Aux lamp driver and realized it was the problem. I had it rebuilt for $15 and haven't had any issues since. It's a great machine. One of my "keepers".