Originally posted by magkelly Darn, that Vivitar 3700 is probably not going to work then. I got it with my Yashica. There's nothing on it that says Yashica as I recall, but I'll have to check it again just to see if it says anything. I don't really have a designated Pentax flash though. Most of mine seem to be generics. Only one is labeled for a particular camera maker, and that's a Yashica one I think. I may have to just take my chances and hope I can figure out something later flash-wise.
You should still be able to trigger whichever flash you want in manual mode, the module is for TTL flash exposure control. As long as the trigger voltage is safe....but you've already looked in to that.
There could be just a short or small problem causing the issue with the camera. What I would want to know is what caused the problem - you may not be able to find out.
Make sure you get a very good deal on the camera since you really don't know.