I have five pieces Beo LC2 which worked perfectly in many years . Suddenly they do not work . 
There are in different rooms , but none of them work anymore with Beo4 or the touch. In this context it should be mentioned that I live in a house with very radiated ing daylight but LC2 works neither in daylight or evening light . 
After a few days , all of a sudden work again. Has anyone encountered this problem and how to solve this?