Sky Stream image

[Woodsy171]

When watching sky stream the screen flickers to grey image and when come back on the sound is out of sync.

[lettice]

Most often the cause for your kind of issues is you are possibly not getting a stable enough connection to your puck , or getting some kind of interference

Would suggest first trying a restart of your Sky Stream box
Go to Settings>Systems Management>Resets & Updates
Select Restart device
Your Sky Stream puck will perform a reboot. It will take a few minutes to complete.

To check your speed is the minimum required for Sky Stream, can you do a network speed test on each of your Pucks.

Sky recommended minimum broadband speed is 25Mbps. Or 30Mbps if you add an extra Sky Stream puck or to watch in UHD.
To run the test launch Netflix on your pucks (you do not need to be logged into it, if you do not use netflix) and scroll down the left menu to Get help.
Choose Check Network.
Would suggest running the test a few times, say a few minutes between tests.
What is your speed?

Also, it may be suffering from interference, more often seen as an intermittent blip.
Not always a cure, but the following may help to resolve;
Make sure you have a good 6-8 inches free on all sides of the puck.
Do not stack the puck on top of any other device.
Best not to sit it on a glass shelf. Wood is generally the best.
Make sure the puck is in the open, not tucked away in a cabinet or sat directly behind the TV.
Make sure you have no other devices that can cause interference closeby, like cordless phones, radiators, baby monitors, smart meter in home displays, microwaves and the like.

Plus, change both your pucks to following recommended settings set in Settings>
Set Network standby mode to ON

If you are using an ethernet connection or change to an ethernet connection at any point, turn wifi OFF under Network if connected via ethernet.