Is it safe to say that the camera works fine with the flash Down or are there other issues as well? I know that some of the early onboard flashes (even on the K10d) would burn out if the camera were using the flash to strobe as an AF assist lamp. It's possible (I guess) that the AF system is waiting for that strobe to operate before focusing. That's guess work on my part and may be completely wrong. I haven't seen a report of it happening in quite awhile. In any case, it sounds like it may be time for an external shoe mounted flash. It may not be worth repairing the built in one.