One of the guys here at work had a problem with a magic eye and he found this when he went searching.
There are a few thing to check - If your Magic Eye is lighting up at the remote TV, then you probably have a faulty Magic Eye.
If your Magic Eye is not lighting up - At the sky box, press Services, then press 4, then type in 0 1 select, then press 4. Make sure the RF 2 Power is switched ON.
If that didn't work take the Magic Eye and plug it straight into the RF 2 socket on the back of the receiver, if it still doesn't light up you've probably got a faulty Magic Eye.
If it did light up, the most probable explanation is that power is not getting from the receiver to the eye. Possible causes -
If you have a wallplate between the RF 2 output and the Magic Eye, there is a possibility that the wallplate will not pass power. You will need to change it for a 'non-isolated' wallplate.
If you are using a coax connector to connect your aerial lead to the RF 2 socket, the coax connector may not pass power.
If you have any splitters or amplifiers between the RF 2 output and the magic eye, that are not specifically designed to work with Magic Eye's they won't pass power, you will need to change it for a one that does.