Repair a sticky iris...black screen when taking photos.

Repair a sticky iris...black screen when taking photos.

Tried almost all the suggestions on the Internet regarding a black LCD screen when wanting to take a photo. Tapping the camera on a desk while extending the lens would have it working for a day. The following day it would not work. Remembered an old HDD trick for failed drives. Place the camera in a plastic bag and put it in the fridge for a good few hours.