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Is it Sky box connected into video input of TV?
OK, let me repost the question for other experts to have a look and to assist you.
Hi I`m Jack
Do you have you equipment in hand and want to install it or are looking for the correct remote extender (magic eye ) ?
Something like this perhaps ?
That is just an example as there are quite a few models out there but one thing they all have in common is that they are to be used on the sky box second tv output , if you have one of those new HD sky box with only one output then this won`t work , you will need a different setup