Some additional notes: there are at least 10 screws that have to be removed and they are several different types, don't mix them up. This procedure does not compromise the water proof integrity of the camera. I use a tiny amount of Vaseline on the data port and battery compartment seals to protect against water intrusion.

If your camera can display pictures and can connect to a computer, but any picture taking mode fails, this procedure might be the solution. It fixed mine. My symptoms were the camera would emit many rapid beeps, too fast to count when any picture mode was selected and then the camera would power down. Before you start see if you can free up the lens cover with a straight pin poking the lens cover at the top outer corner and pushing the lens cover down. Carefully not to scratch the lens screen or bend the lens cover. It should move down with a fair amount of force and then snap back. If the lens cover can be moved down but does not snap back or it can't be budged this procedure might fix the camera. You might find that after forcing the lens cover open the camera will begin to function. The manufacture says not to use any solvents or cleaning products, but I found that Windex with the ammonia dissolves the calcite. If the lens cover does move and does snap back, then a stuck lens cover is not the problem.

and the third screw underneath the speaker plate holding the front plate.

You have to follow direction for removing the on/off switch first, there are screws holding the front plate underneath the top plate. This can be seen in set five. Also the bottom plate will need to come off, there is one screw underneath it ,in the center, holding the front plate. If the bottom plate is not removed, a tang will be broken off the front plate.