the camera actually belongs to a co-worker. Symptoms: No viewfinder, no rear LCD. Camera appears to focus and you can hear the shutter fire, but no image in viewfinder or rear screen. won't even play back images already on card. Screens light up and show settings, but no feed from the sensor. Tried various settings, LEDs flash, no photo. Pulled the battery and card, no joy. I can't find anything on-line dealing with a problem like this. suggestions?