Thanks for confirming this for us @Blackmole
The article does advise the box will no longer be supported.
You could try getting in touch and the team will see if they can suggest anything for you to try.
Leanne.
@Blackmole
If possible, you should return it as very old & all but obsolete.
As for pairing the TV, JVC is just another brand that has long since ceased manufacturing its own TVs. I think the brand name is currently owned/licensed to Currys, so maybe they can tell you who the actual manufacturer is. If there's a code listed for Vestel, that might be worth a try.