I recently took all my 3902 boards over to Interstate Battery to have them solder on some battery cell holders. Yesterday, I started testing the boards to make sure the soldering was a success. I used two machine cabinets and the same 22 chip to test about 30 boards. My last 2 tests have not gone well. When I inserted a board in machine "A", I heard a popping noise and experienced a foul smell. I then tried a new board in machine "B" and experienced the same popping noise and foul smell. I now see black marks in the same area underneath the multimedia lite boards. Do you think it’s a coincidence that these failures happened consecutively (different boards in different machines) or could something have happened to my 22 chip that will also cause a similar failure on my next test? Am I somehow overworking the chip or the machine cabinets with all these tests? If I just replace the multimedia boards, do you think the main board, software, machine cabinets, etc. will be ok? The last thing I want to do is damage the machines. Thanks for the insights!