My tv box was working fine when using the Ethernet cable but now that I switch to the WiFi I can only access apps eg Netflix but no channels.
The loading page gets stuck at 16% and then I get an S101 error code. Please advise.
Assuming you have a V6 and not a TiVo (check here If you're not sure), your TV channels use the white co-ax cable, streaming apps & OnDemand use your internet connection.
https://www.virginmedia.com/help/virgin-tv-error-codes/s101 gives some advice dealing with this error code.
If you follow Home > Help & Settings > Settings > Network, your internet connection status is reported in the top-right corner.
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