I have experienced that sinking pit in your gut feeling that precedes the onset of panic. And thinking this has to be something I'm doing wrong, just slow down and think it through. In my case it was a flash not working while models were standing around. Finished the shoot without the flash, with expected (poor) results.
Originally posted by kjg48359 Also, what do pro's do, just use extra bodies?
My definition of a 'pro' is someone who overcomes all adversity and completes the job well, on time and looking as if it was no big deal. So, yeah an extra body, battery, lens, memory card, flash and anything else that can go wrong extra is required IMHO. Anything can break, or get stolen, or lost or whatever.
Sorry your k-3 is acting up, and I wish I had something for you but it looks like you have tried everything I would. What did the dealer say?
Did you check inside the battery compartment to see if the little contact springs are sticking out?