A few customers have been suffering from this problem or similar of late.
Sky are aware some customers are having this issue.
Try the following;
Reboot your broadband router.
Leave the puck off power for ten minutes or more, then go through this process;
Hold down the Standby button on your puck for 30 seconds or longer, only then turn it back on at the mains while still holding the button.
Leave the puck powered on and connected to Ethernet for one hour or longer.
Press the Standby button on your Sky Stream remote.
Turn the puck off at the mains, then straight back on again
Sky Community Superuser. What is a Superuser?
Click here to find outSky Stream with two pucks (Former Sky Q and Sky+ customer), Sky Ultrafast + using Sky SR203 hub. Sky Protect kit tester.
My good journey to Sky Stream from Sky Q.
Click here to read
