I have 2 older Game Spy D-40 cameras. Both of them are doing the same thing. When first powered up they work great. They trigger good and and the flash works good. However, after the camera goes to sleep, they won't wake back up. You have to press the On/Off button to wake them up. The camera will work again while it is awake but the problem reoccurs when the camera goes to sleep again. Is this a simple fix?