Many thanks Chakkarinen and all others whom have read abot my problems. I now found out (thanks to the Forum) that my Power Adaptor was malfunctioning and I went to one of our Swedish local shops (Clas Ohlsson) and bought a new one for Sek 399 abt. EUR 45. Installing the new one it was like magic!=) the SB started immediately to work!
Happily this happened while being at home for a short while before going abroad for another session!
Many thanks for the valuable Forum and the headline Power problems....!!!
Now I will enjoy my TV network again!