View source for GX10/K10D Repair

I currently got a non working Samsung GX10 digital camera (DSLR). It turned out, that the GX10 is almost the same camera as the Pentax K10D. This promised a huge variety of how to´s and documents. Unfortunately I could not find that much information online.

= The Defect =
The camera refuses to take any pictures. When pressing the shutter release button, a rumbling noise can be heard and felt. It´s prduced by the moving SR block which carries the CCD sensor and reduces shocks while exposure. This noise is normal but hard to hear in a functional camera, because the mirror/shutter is much louder. Not in this faulty camera: '''The mirror is not moving a bit when pressing the release button.''' No mirror or shutter movement, also no noises from a blocked motor or electric magnet. The camera does not show any error messages. Everything works as normal but taking a picture is impossible. 

OK, let´s take a look inside ...

= Finding The Reason =
I removed the bottom of the camera´s housing first, then the rest of it. Of course I touched the supply voltage for the flash which can be quite painful. '''Discarge the flash before proceeding!''' A good spot for discarging is a solder pad near the view finder (see picture). I used a 1k resistor against the chasis ground.
[[File:Gx10 flash supply.jpg|200px|thumb|right|Flash supply voltage]]
I pushed the release button several times and noticed that the lower right corner of the main PCB was getting very hot. What´s wrong with it?

The heat came from a motor driver IC which seem to control the GX10´s two motors.

[[File:Gx10 motordriver.jpg|200px|thumb|Location of the motor driver]]