Sky Digibox (pace) problem

No idea what ive done but...

when i go into tv guide, instead of the usual blue background i have an image of a channel i recently watched. everything else is ok, but i cant get rid of it.

its a standard digibox (pace) and Ive no idea how to reset it. is there a method for forcing a reset and also how do i update the software or is it handled automatically?

 

could be first signs of problem.

1 check all cables are correctly inserted etc
2 software download remove viewing card, turn stb off at mains, press and hold back up and select buttons together whilst turning back on at mains after about 20-30 second all lights on front should light up, this means software downloading will show on tv if connected via scart, wait till all lights are out , turn on stb and insert viewing card

 

Thanks morphy, did the reset as described and i have my nice blue background again.