If the above method does not work, the LNB may have a fault.
Press the [SERVICES] button and then press    then [SELECT]
On Sky HD, press the [SERVICES] button and then press    then [SELECT]
Press the buttons in the sequence above exactly - do not atttempt to use [UP] or [DOWN]. Note that when you press the second 0 and 1 nothing happens on the screen until you press the final [SELECT]. This is a "hidden menu".
Kath: Although an indication of inputs 1 & 2 not being locked can be caused by a fault having developed in the box, but though, it can also be symptomatic of the box not receiving a signal due to the dish having been knocked out of alignment, or alternatively something having happened to the coax cables from said dish.
As far as a fault in the box is concerned, about the only fault Sky boxes of the older variety suffer from is power unit failure caused by defective (dried out) electrolytic capacitors, a simple way to test being to disconnect the box from the mains for about 25 minutes or so to cool down before reconnecting again, if the box bursts back into to life then the power unit is defective, likewise likely to fail again after an hour or so.
When you mention "going back to normal TV viewing", if your TV is capable of freeviewreception and your aerial is still OK?, then there is no reason for not being able to return to normal viewing, just make sure that the aerial is connected into the TV and that the TV's remote control "input select" button is set to either TV/D/or DVB, you should also remove the scartcable connecting the Sky box into the TV.