The hub shouldn't affect the picture in any way, all I can think is that perhaps the coaxial (white) cable is loose at the back of the Virgin box. Can you check this is secure for me and if it's still happening I would like to arrange for a technician to take a closer look.
Thanks for coming back to us on this. Just before we look at booking at engineer, I have noticed that your TiVo® has been online for quite some time. It has built up a few timeouts so we need to clear these.
Can you turn the TiVo® off at the mains and leave off for 5 minutes. Turn back on and wait for it to be back online and working.
Do you notice any thing different with the picture or are you still getting the same issues?
Come back and let me know.
Kath_F Forum Team
Tech fan? Have you read our Digital life blog yet? Check it out