No 9v output from my sky+ box?

I have a sky+ box and an ordinary sky box, a television in the lounge and one in the kitchin. I wanted the facility to watch programs from both boxes while in the kitchen,Fitted a coaxil cable switch to see programs from each box via the magic eye - which used to work. After fitteing and switching picture was bad so removed switch. Now neither box will out put the 9v to operate the magic eye. Ive looked inside the sky+ box for a fuse but only find the mains in fuse. Can i repair the box's? any suggestions please? and yes i wont be doing this again as my girl frind is hopping mad with me!! ;-) (the outout is enabled from each box)