No display messages on NX5
 

writing you about tech issue I experienced with my Sony NX5E. Suddenly it stop to show picture out of SDI output. Then I reset it with pencil in small hole right to the display after what I got picture on the display. However there is no any text or messages on display as well as none from the buttons react on push. so nothing happens when I press button. Not even power off button turns camera off (only plug out from power helps).

What you think what is it about and what is workaround? Of course take it to the service shop, but what I can expect what is wrong on the camera? Any experience similar to this?