TV Will not turn on.

Hi I'll try and give as much info as possible, keeping it short and sweet!

Samsung TV AU7100 will not turn on. Have rebooted/restarted Router and Virgin Box several times. (Not sure of Box Model - Part Number indicates it was made by Toshiba).  Amber light steady on Virgin Box as usual (should this amber light flicker when remote is used - it doesn't. Checked all connections - All OK. Purchased new Samsung Remote - Still no joy.  Is there any way I can check if the Virgin Box is working OK before having to consider new TV :-(

If I need to contact someone, unfortunately telephone is not an option because of hearing issues.

Hoping someone can help - Regards - BobT