Hi NYBrummie,
The original issue of the channel logos on the EPG disapping, with the channel names being shown as text, along with being unable to access On Demand programs is due to a lack of internet connection on the TV360 box.
(There is usually also an onscreen error message displayed such as CS9993 which can be checked, along with a possible solution by opening the following page https://www.virginmedia.com/help/check/tv-error-codes
The above may have been caused by a known issue which has been experienced over the past couple of days.
Whenever you have any problems you should use the /check-services/ function to check for problems in your area. You can also a run a test on your equipment from there. If nothing is showing you could also try the automated Service Status number 0800 561 0061. This often gives details of more local issues down to postcode level.
The current problem of just displaying the welcome screen may also be due to a lack of an internet connection. Are you connected wirelessly or via an ethernet cable? If it's an ethernet cable double check that it's tightly connected into the hub and the 360 box.
Due to being stuck on the welcome screen you should also try the following.
Try turning off the 360 by the switch on the back of the box; then on the front of the 360 box hold down both the power button and the - (minus) button at the same time. Then turn on the 360 again whilst keeping hold of those buttons for a further 30 seconds.
If the power button and the - button workaround doesn't solve it then try using the power button and the + (plus) button at the same time instead.
